Maxtec MaxBlend 2+p User manual

60
50
40
30
21
70
80
90
100
%O2
MaxBlend®
2+p
LOW FLOW / HIGH FLOW
R229M36 REV. A
Instructions for Use
ENGLISH

ENGLISH 2WWW.MAXTEC.COM • [phone]
Read this entire manual before attempting to operate or service the MaxBlend 2+p. Attempting
to operate the MaxBlend 2+p without fully understanding its features and functions may result
in unsafe operating conditions.
CLASSIFICATION
Protection against electric shock ............................................................................................ Class II
Ingress Protection.......................................................................................................................... IPX1
Mode of operation .............................................................................................................Continuous
Sterilization.................................................................................................................. See section 6.0
Applied Parts....................................................................................................Type B (Entire Device)
Flammable anesthetic mixture ..................................................................................See section 9.4
CAUTION: Federal law restricts this device to sale by, or on the order of, a medical
professional.
Product Disposal Instructions:
The sensor, batteries, and circuit board are not suitable for regular trash disposal.
Be sure to dispose of expired sensors in accordance with hospital, local, state, and
federal regulations, or return to Maxtec for proper disposal or recovery. There are
no special considerations for the disposal of the product packaging.
WARRANTY
The MaxBlend 2+p is designed for air/oxygen delivery. Under normal operating conditions, Maxtec
warrants the MaxBlend 2+p to be free from defects of workmanship or materials for a period of
three years from the date of receipt from Maxtec, provided that the unit is properly operated
and maintained in accordance with Maxtec’s operating instructions. Based on Maxtec’s product
evaluation, Maxtec’s sole obligation under the foregoing warranty is limited to making repairs,
or issuing credit, or replacement for equipment found to be defective. This warranty extends
only to buyers purchasing new equipment directly from Maxtec, or through Maxtec’s designated
distributors and agents. Maxtec warrants the MAX-550E oxygen sensor in the MaxBlend 2+p to
be free from defects in material and workmanship for a period of two years from Maxtec’s date
of shipment in a MaxBlend 2+p unit. Should a sensor fail prematurely, the replacement sensor is
warranted for the remainder of the original sensor warranty period. Routine maintenance items,
such as batteries, are excluded from warranty. Maxtec, and any other subsidiaries, shall not be
liable to the purchaser or other persons for incidental or consequential damages to equipment
that has been subject to abuse, misuse, misapplication, alteration, negligence, or accident. THESE
WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,
INCLUDING WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
NOTE: In order to obtain optimum performance from your MaxBlend 2+p, all operation and
maintenance must be performed in accordance with this manual. Please read the manual
thoroughly before using the MaxBlend 2+p, and do not attempt any repair or procedure that is
not described herein. Maxtec cannot warranty any damage resulting from misuse, unauthor-
ized repair, or improper maintenance of the instrument.
EMC Notice
This equipment uses, generates, and can radiate radio frequency energy. If not installed and
used in accordance with the instructions in this manual, electromagnetic interference may
result. The equipment has been tested and found to comply with the limits set forth in IEC
60601-1-2 for medical products. These limits provide reasonable protection against electromag-
netic interference when operated in the intended use environments described in this manual.
MRI Notice
This equipment contains electronic and ferrous components, whose operation can be affected
by intense electromagnetic fields. Do not operate the MaxBlend 2+p in an MRI environ-
ment or in the vicinity of high-frequency surgical diathermy equipment, defibrillators, or
shortwave therapy equipment. Electromagnetic interference could disrupt the operation of
the MaxBlend2+p.
WARNINGS
Indicates a potentially hazardous situation which, if not avoided, could result in death or seri-
ous injury.
The following warnings apply any time you operate
or service the MaxBlend 2+p:
◆ALWAYS confirm prescribed flow before administering to patient and monitor flow on a
frequent basis.
◆Always follow ANSI and CGA standards for medical gas products, flowmeters, and oxygen
handling.
DO NOT operate the MaxBlend 2+p unless qualified personnel are in attendance to
promptly respond to alarms, inoperative conditions, or sudden malfunctions.
◆Patients on life-support equipment should be visually monitored at all times.
DO NOT ignore audible alarms of the MaxBlend 2+p. Alarms indicate conditions that
require your immediate attention.
DO NOT use parts, accessories, or options that have not been authorized for use with the
MaxBlend 2+p. Using unauthorized parts, accessories, or options may be harmful to the
patient or damage the MaxBlend 2+p.
◆Check all audible and visual alarms periodically to ensure they are operating properly.
If an alarm fails to activate, contact your Maxtec Certified Service Technician. Be sure
to review and, if necessary, re-set alarms and limits when patient's clinical condition
changes or when the physician prescribes a change in oxygen therapy.
DO NOT operate the MaxBlend 2+p with the monitor powered off or without setting the
adjustable alarms. All adjustable alarms must be set to ensure safe operation.
DO NOT steam autoclave or otherwise subject the MaxBlend 2+p to temperatures above
122°F (50°C).
◆If either the air or oxygen source pressure is reduced or increased sufficiently to create a
pressure differential of 20 PSI or more, an audible alarm will sound. This condition may
significantly alter the FiO2 and flow output from the MaxBlend 2+p.
DO NOT tape, obstruct, or remove the alarm during clinical use.
DO NOT occlude the sensor port on the side of the MaxBlend 2+p.
◆An air inlet/water filter is recommended for use with the MaxBlend 2+p. See section 6.1.
DO NOT use lubricants on the MaxBlend 2+p.
DO NOT use the MaxBlend 2+p until correct performance has been verified. See section 3.0.
◆If a condition is detected that could possibly prevent the monitor from continuing to
operate safely, it will sound an alarm. If, at any time, EOx (i.e. EO2, EO4, etc.) appears on
the LCD refer to section 4.0, or contact a Maxtec Certified Service Technician.
◆All service should be referred to a Maxtec Certified Service Technician.
◆Maxtec recommends that the MaxBlend 2+p be serviced by Maxtec at a minimum of every
three years, or if a leak or other performance problem is suspected.
◆If the MaxBlend 2+p is dropped, follow the procedures outlined in section 3.0 for a perfor-
mance check before reusing the device.
◆When the unit is going to be stored (not in use for more than 30 days), always remove the
batteries to protect the unit from potential damage due to battery leakage.
◆Always replace batteries with high-quality, name-brand “AA” alkaline batteries.
◆The low oxygen alarm can be set below 18%, and as low as 15%. See section 2.3 on setting
alarms. This is in accordance with IEC 80601-2-55.
◆To reduce the risk of cross contamination, only single use pressure monitoring line with
moisture control tubing with an inline filter should be used with this device.
EN Instructions for Use
Conforms to:
AAMI STD ES60601-1, ISO STD
80601-2-55, IEC STDS
60601-1-6, 60601-1-8
Certified to:
CSA STD C22.2 No. 60601-1
NOTE: The latest edition of this operating manual can be downloaded from our website at www.maxtec.com
When is PP being migrated, and after the migration where should the central intranet sit.
Maxtec, LLC
2305 South 1070 West
Salt Lake City, Utah 84119
USA
phone: [phone]
fax: [phone]
email: [e-mail]
web: www.maxtec.com

WWW.MAXTEC.COM • [phone] 3ENGLISH
◆The MaxBlend 2+p is not suitable for use with oxygen 93.
DO NOT allow liquids or debris to enter the pressure monitor port.
◆Replace the pressure monitoring line if condensation build-up occurs.
◆In order to reduce the potential issues associated with condensation, the pressure moni-
toring line connector should be positioned at least 10 inches (25cm) below the monitor.
DO NOT use for pressure in excess of 60 cmH2O.
DO NOT connect pressure monitoring line to patient IV line.
◆Secure the pressure monitoring line to avoid kinks and unintended disconnects.
To prevent risk of burns, fire, or injury to person(s):
◆Mixed gases continuously bleed into the atmosphere at the oxygen concentration rate
set at the control knob. Bleeding oxygen into any closed area could increase the risk of
fire or explosion.
DO NOT operate this device in the presence of any flame or source of ignition, or when
using devices such electrosurgical equipment or defibrillators.
DO NOT operate the MaxBlend 2+p in the presence of flammable anesthetics or in an
atmosphere of explosive gases. Operating the MaxBlend 2+p in flammable or explosive
atmospheres may result in fire or explosion.
◆Galvanic O2sensor electrolyte gel is acidic and may cause skin or eye irritation and/
or burns. Take care when handling or replacing exhausted or damaged disposable O2
sensors.
◆Be sure to dispose of expired sensors in accordance with hospital, local, state, and federal
regulations, or return to Maxtec for proper disposal or recovery.
DO NOT smoke in an area where oxygen is being used.
◆When using the approved external power supply, functional batteries must also be
installed in the device. The device will not operate solely on the external power supply.
◆The MaxBlend 2+p may only be calibrated using 20.9% (room air) or 100 oxygen.
Calibration at other concentrations will result in inaccurate readings.
DO NOT attempt to replace the oxygen sensor or batteries while the device is in use.
◆Any serious incident that has occurred in relation to the device should be reported to the
manufacturer and the competent authority of the European Member State in which the
user and/or patient is established as applicable.
◆Use only genuine Maxtec accessories and replacement parts. Failure to do so may seri-
ously impair the monitor's performance. Repair or alteration of the MaxBlend 2+p beyond
the scope of the maintenance instructions or by anyone other than an authorized Maxtec
service person could cause the product to fail to perform as designed. No modification of
this equipment allowed.
DO NOT use if gas leak is detected. Return device to Maxtec for repairs..
DO NOT use device for mixing of gases other than oxygen and medical air.
CAUTIONS
Indicates a potentially hazardous situation which, if not avoided, could result in minor or mod-
erate injury and property damage.
DO NOT store the MaxBlend 2+p in hot areas for prolonged periods of time. Temperatures
above 80°F (27°C) can shorten battery life.
◆To minimize the potential for electrostatic shock, DO NOT use antistatic or electrically
conductive hoses with the MaxBlend 2+p.
When cleaning the MaxBlend 2+p:
DO NOT use harsh abrasives.
DO NOT immerse the MaxBlend 2+p in liquid sterilizing agents or liquids of any kind.
DO NOT spray cleaning solution directly onto the sensor port, bleed muffler, or buzzer
opening.
DO NOT allow cleaning solution to pool on the front panel, sensor port, or bleed muffler.
DO NOT sterilize the MaxBlend 2+p. Standard sterilization techniques may damage the
blender.
DO NOT clean or dry the MaxBlend 2+p with a high pressure air gun. Applying high pres-
sure air to the MaxBlend 2+p may damage components and render the system inoperable.
DO NOT over-clean the MaxBlend 2+p. Repeated use of a cleaning agent can cause residue
build-up on critical components. Excessive residue buildup can affect the MaxBlend 2+p’s
performance.
◆Dropping or severely jarring the sensor after calibration may shift the calibration point
enough to require recalibration.
◆Always operate the MaxBlend 2+p with clean, dry medical-grade gases. Contaminants
or moisture can cause defective operation. Oxygen should have a minimum dewpoint
of -80°F (-62°C) or moisture content less than 7.9 PPM (0.0059mg/L). Oxygen “purity”
should be at least 99.0% and the air used should be medical-grade. Water vapor content
must not exceed a dew point of 5°F (-15°C) below the lowest ambient temperature to
which the delivery system is exposed.
◆Particulate content must not exceed that which would be found immediately down-
stream of a 15 micron absolute filter. Refer to CGA commodity specifications G-4.3 and G7.1
for more information. Water vapor content of medical air or O2 supply to the blender must
not exceed 5.63 x 103 milligrams H2O per cubic meter of non-condensable gas.
DO NOT disassemble the MaxBlend 2+p. All service should be performed by a Maxtec
Certified Service Technician.
◆Be sure the MaxBlend 2+p is securely mounted. This device is usually mounted to a hos-
pital rail system or an infusion stand. Dropping the device may cause injury or damage
to the device.
◆The outlets of this device are capable of delivering pressure as high as the inlet pressure.
Ensure that the devices that carry the gas from the blender to the patient prevent exces-
sive pressure to the patient.
DO NOT use the oxygen sensor if it appears to be damaged or is leaking. The oxygen
sensors contain a weak acidic solution encapsulated in a plastic housing. Under normal
operating conditions the solution (electrolyte) is never exposed.
NOTES
Indicates supplemental information to assist in the use of the device.
◆The MaxBlend 2+p is tested for compliance with ISO 11195, and meets requirements
regarding reverse gas flow as delivered.
◆Applicable parts used in the MaxBlend 2+p have been cleaned and degreased for oxygen
service. Any lubricants used are designed specifically for the application.
◆As long as the absolute pressure of the gas mixture being monitored is constant, the
MaxBlend 2+p will accurately read oxygen concentrations. However, if the absolute pres-
sure varies the reading will fluctuate proportionately, as the sensor actually measures the
partial pressure of oxygen in the mixture. The sensor readings will also change propor-
tionately with barometric pressure changes; because of this, frequent calibration of the
sensor is recommended.
◆Users are advised to use pressure regulators which display the outlet pressure.
◆All specifications assume the following standard environmental conditions, unless speci-
fied otherwise: ambient and sample gas temperatures of 77°F (25°C), barometric pressure
of 30inHg (760mmHg), sea level altitude, ambient relative humidity of 50%, sample gas
relative humidity of 0%.
◆It is important to note that the oxygen concentration selection scale is provided only as
a guideline for selecting O2 concentrations. The clinician should use the MaxBlend 2+p’s
display panel to adjust the O2 concentration to the desired setting.
◆The alarm limits can be set to levels that would render them useless for a particular
patient’s clinical condition. Ensure that the delivered oxygen level and flow rate are set
to values prescribed by the patient’s physician. Also ensure that the high and low alarm
limits are set to levels such that they will sound if the oxygen level is outside of safe limits.
Be sure to review and, if necessary, re-set the alarm limits when the patient’s clinical con-
dition changes, or when the patient’s physician prescribes a change in oxygen therapy.
◆This device does not contain automatic barometric pressure compensation.
◆Gas leaks that cause room air to mix with the gas sample may cause inaccurate oxygen read-
ings. Ensure the O-rings on the sensor and flow diverter are in place and intact prior to use.

ENGLISH 4WWW.MAXTEC.COM • [phone]
CLASSIFICATION............................................................................................................................2
WARRANTY.................................................................................................................................................2
WARNINGS .......................................................................................................................................2
CAUTIONS ..........................................................................................................................................3
NOTES.......................................................................................................................................................................3
1.0 BASE UNIT DESCRIPTION........................................................................5
1.1 Indication for Use.....................................................................................................................................5
1.2 Essential Device Performance........................................................................................................5
1.3 MAX-550E Oxygen Sensor.................................................................................................................5
1.4 Symbol Guide............................................................................................................................................5
1.5 Component Identification.................................................................................................................6
1.6 Display Indicators...................................................................................................................................6
1.7 Back View.....................................................................................................................................................7
1.8 Requirements for Operating the Blender..............................................................................7
2.0 OPERATING PROCEDURES.................................................................7
2.1 Setup and Installation..........................................................................................................................7
2.1.1 Battery Installation..............................................................................................................7
2.1.2 Adjusting Alarm and Calibration Modes..............................................................8
2.1.3 MaxBlend 2+p Setup..........................................................................................................8
2.1.4 Sensor Installation..............................................................................................................8
2.2 Monitoring...................................................................................................................................................8
2.3 Alarm Setting Procedure...................................................................................................................8
2.3.1 Low Alarm Setting ..............................................................................................................8
2.3.2 High Alarm Setting............................................................................................................8
2.3.3 Smart Alarm Mode.............................................................................................................9
2.3.4 Pressure Monitoring and Alarms.............................................................................9
2.4 Basic Operation.......................................................................................................................................9
2.4.1 Pressure Monitoring Operation..................................................................................9
2.5 Alarm Conditions and Priorities...................................................................................................9
2.5.1 Multiple Alarms..................................................................................................................10
2.6 Backlight Operation..........................................................................................................................10
2.7 External Power Supply Operation..........................................................................................10
2.8 Calibration Procedures...................................................................................................................10
2.8.1 Calibration to 100% Oxygen......................................................................................10
2.8.2 Calibration to Room Air..............................................................................................10
2.8.3 Zero Calibration...................................................................................................................11
2.9 Flowmeter Operation.........................................................................................................................11
3.0 PERFORMANCE CHECK..............................................................................11
3.1 Blender Safety Check...........................................................................................................................11
4.0 PRESSURE MONITOR TESTS...........................................................11
4.1 Pressure Monitor Accuracy Test...................................................................................................11
5.0 TROUBLESHOOTING........................................................................................12
6.0 CLEANING AND DISINFECTING............................................13
7.0 SERVICE AND MAINTENANCE..................................................13
7.1 Maintenance.............................................................................................................................................13
7.2 Replacing O2 Sensor..........................................................................................................................13
7.3 Monitor Alarm Testing......................................................................................................................13
8.0 ABBREVIATION GUIDE...............................................................................13
9.0 SPECIFICATIONS........................................................................................................13
9.1 Instrument Specifications..............................................................................................................13
9.2 Pressure Monitor Specifications................................................................................................14
9.3 Alarm Specifications.........................................................................................................................14
9.4 O2 Sensor Specifications................................................................................................................14
10.0 FACTORS INFLUENCING CALIBRATION......14
10.1 Temperature Effect...........................................................................................................................14
10.2 Pressure Effect....................................................................................................................................14
10.3 Humidity Effect...................................................................................................................................14
10.4 Exposure to Anesthetic Gases..................................................................................................14
11.0 SPARE PARTS AND ACCESSORIES..............................14
12.0 THEORY OF OPERATION....................................................................15
12.1 Operational Diagram.......................................................................................................................15
12.2 Mixing Operation...............................................................................................................................15
12.3 Gas Outlet................................................................................................................................................15
12.4 Alarm/Bypass Function.................................................................................................................15
13.0 FLOW CHARACTERISTICS..............................................................15
14.0 ELECTROMAGNETIC COMPATABILITY.............16
TABLE OF CONTENTS

WWW.MAXTEC.COM • [phone] 5ENGLISH
1.0 BASE UNIT DESCRIPTION
The MaxBlend2+p isa compact air/oxygen gasmixingdevice withan integratedflowmeterwhich
incorporates the use of a battery powered oxygen and pressure monitor. This device should only
be used by clinically trained operators with sufficient knowledge, training and understanding
of this manual. The gas mixing device (blender) provides precise mixing of medical-grade air
and oxygen, while the oxygen monitor measures the selected oxygen concentrations from the
blender’s gas flow and displays these measured concentrations on a digital display. The pressure
reading displayed is a 2 second mean pressure, relative to the ambient conditions, ie. referenced
to ambient as 0. The monitor provides user adjustable low and high alarm limits which, when
exceeded, trigger an audible and visual alarm. The associated low and high alarm limits are
displayed to the left and right of the readings respectively. The monitor indirectly contacts the
patient through the breathing gas pathway via the MAX-550 Oxygen sensor membrane.
1.1 Indication for Use
The MaxBlend 2+p is intended to provide a continuous air/oxygen gas mixture and to
continuously monitor the concentration of oxygen and pressure being delivered to infant,
pediatric, and adult patients. It is a restricted medical device intended for use by qualified,
trained personnel, under the direction of a physician, in professional healthcare settings, i.e.,
hospital, subacute, and nursing-care facilities where the delivery and monitoring of air/oxygen
mixtures is required. This is not intended as a life supporting device or life sustaining device.
1.2 Essential Device Performance
Essential performance are the operating characteristics of the device, without which would
result in an unacceptable risk. The following items are considered essential performance:
•Oxygen measurement accuracy
•Pressure measurement accuracy
•Operation of visible and audible alarms
•Operation of blender bypass
•Operation of reverse gas flow protection
1.3 MAX-550E Oxygen Sensor
The MAX-550E is a galvanic, partial pressure sensor that is specific to oxygen. It consists of two
electrodes (a cathode and an anode), a teflon membrane and an electrolyte. Oxygen diffuses
through the teflon membrane and immediately reacts electrochemically at a gold cathode.
Concurrently, oxidation occurs electrochemically at a lead anode, generating an electrical
current and providing a voltage output. Electrodes are immersed in a unique gelled weak acid
electrolyte, which is responsible for the sensor’s long life and motion insensitive characteristic.
Since the sensor is specific to oxygen, the current generated is proportional to the amount of
oxygen present in the sample gas. When no oxygen is present, there is no electrochemical
reaction, and therefore, negligible current is produced. In this sense, the sensor is self-zeroing.
CAUTION: The MAX-550E oxygen sensor is a sealed device containing a mild acid
electrolyte and lead (Pb). These materials are hazardous waste constituents. Be sure to
dispose of expired sensors in accordance with hospital, local, state and federal regulations, or
return to Maxtec for proper disposal or recovery.
NOTE: The MaxBlend 2+p monitoring system indirectly contacts the patient through the
breathing gas pathway.
CAUTION: Dropping or severely jarring the sensor after calibration may shift the calibra-
tion point enough to require recalibration.
1.4 Symbol Guide
The following symbols and safety labels are found on the MaxBlend 2+p and/or labeling:
ON/OFF Key ON/OFF Key
Medical Device
UDI
Unique Device Identifier
Calibration/Zero Key Silent Key
Calibration Reminder Smart Alarm Key
Unlock Key Low Alarm Indicator
Backlight Key Alarm Silence Indicator
High Alarm Indicator UP (High Alarm Key)
Smart Alarm Mode Indicator
Attention, consult
accompanying documents
(blue background with
white pictogram)
DOWN (Low Alarm Key) Caution
Power Supply Indicator MR Unsafe (red circle/diagonal
with black pictogram)
Battery Indicator
Federal law (USA) restricts
this device to sale by or
on order of a physician.
Warning (yellow background
with black triangle/pictogram) Meets ETL standards
Do Not (red circle/diagonal) Serial Number
Below 18% Alarm Indicator Catalog Number
Inlet Do not throw away. Follow
local guidelines for disposal
Outlet Liters Per Minute
Read Flow at Center of Ball Ingress Protection Rating
Oxygen Percent Corrosive
Oxygen Enriched Air Type B Applied Parts
Use No Oil
50°C
(122°F)
-15°C
(5°F)
Storage Temperature Range
Manufacturer Combined UL / CSA Mark
Direct Current Complies with Directive
2011/65/EU
Pressure Mode Date of Manufacture
Oxygen Mode Single Use
Two means of patient
protection (double
insulated) Humidity Limitation
For use in dry indoor
locations. Power Plug Polarity
Regulatory Compliance Mark Batch Code
Non-DEHP Not Manufactured with
Natural Rubber Latex

ENGLISH 6WWW.MAXTEC.COM • [phone]
1.5 Component Identification
1
LOW ALARM LED — In a low alarm condition, the “LOW ALARM” LED will flash twice a
second, accompanied by the audio buzzer.
2
HIGH ALARM LED — In a high alarm condition, the “HIGH ALARM” LED will flash twice a
second, accompanied by the audio buzzer.
3
ON/OFF AND MODE KEY — This key is used to turn the device on or off. To turn
the device OFF, the button must be held while a rapid 3-2-1 countdown takes place to
prevent accidental power-off. This button is also used to toggle between oxygen (O2)
and pressure (P) modes when the device is unlocked.
4
UNLOCK KEY — The unlock key is used to lock and unlock the instrument.
5
UP (ALARM HIGH) KEY — The up key is used in setting the high alarm limit. The
device must be in the unlocked state for the key to operate. See section 2.3.2 for instruc-
tions on setting the high alarm limit.
6
CALIBRATION KEY — This key is used to calibrate or zero the device. The device
must be in the unlocked state for the key to operate. See section 2.8 for instructions on
calibrating.
7
PRESSURE MONITOR PORT — This port is used for connecting pressure monitoring line
for pressure monitoring.
8
O2 INLET FITTING — An O2 fitting for connection to the O2 inlet hose from the gas source.
9
OXYGEN CONCENTRATION SELECTOR CONTROL — A knob which allows for selections of
mixed oxygen concentrations from 21% to 100%.
q
MEDICAL AIR INLET CONNECTOR — An air fitting for connection to an air inlet hose from
the air gas source.
w
FLOWMETER OUTLET — A fitting for connection to the patient delivery tubing.
e
BLEED TOGGLE SWITCH — The Bleed Toggle Switch turns on the auxiliary bleed. For the
blender to accurately mix the oxygen and air, the bleed must be turned on whenever
the total flow delivered to the patient is less than 15 LPM for high flow model, or less than
3 LPM for low flow model.
r
FLOW CONTROL KNOB — The flow control knob controls the flow of gas exiting the
flowmeter.
t
OXYGEN FLOWMETER — Measures the flow of mixed gas exiting the flowmeter outlet.
y
SMART ALARM KEY — The smart alarm key is used to help set the High-Low Alarm
window quickly. This automatically sets oxygen alarms at ±3% or pressure alarms at
±2cmH2O.
u
DOWN (LOW ALARM) KEY — The down key is used in setting the low alarm limit.
The device must be in the unlocked state for the key to operate. See section 2.3.1 for
instructions on setting the low alarm limit.
i
BACKLIGHT KEY — The backlight key will manually activate the backlight for 30
seconds. See section 2.6 for more information on backlighting operation.
o
SILENT KEY — In an alarm condition, pressing the SILENT key will deactivate the
audio alarm for 2 minutes.
p
LCD DISPLAY — The digit liquid crystal display (LCD) provides direct readout of oxygen
concentrations and pressures. The digits also display error codes, alarm set modes, and
calibration codes as necessary.
1.6 Display Indicators
a
PRESSURE READING — Current pressure reading of the sample in centimeters of water
(cmH2O).
c s
d
f
g
x
z;
k h
l j
MaxBlend 2+p Display a
60
50
40
30
21
70
80
90
100
%O2
1 2
e
t
u
i
o
r
y
3
4
5
6
8 79qw
p

WWW.MAXTEC.COM • [phone] 7ENGLISH
s
HIGH PRESSURE ALARM LIMIT — High pressure alarm setpoint. Audible and visual
alarms will trigger when this limit is exceeded. Double dashes (--) indicates the alarm is
inactive.
d
OXYGEN CONCENTRATION — Current oxygen concentration percentage from the oxygen
sensor.
f
HIGH ALARM INDICATOR — High alarm symbol used for identifying the high alarm
setpoints and when a high alarm is triggered.
g
OXYGEN HIGH ALARM LIMIT — High oxygen alarm setpoint. Audible and visual alarms
will trigger when this limit is exceeded. Double dashes (--) indicates the alarm is inactive.
h
POWER SUPPLY INDICATOR — Indicates when the device is connected and receiving
power from an external power supply. NOTE: Batteries are still required for proper
operation.
j
CALIBRATION REMINDER — The calibration reminder symbol is located at the bot-
tom of the display. This symbol will be display when one week has elapsed from the
previous oxygen calibration.
k
BATTERY INDICATOR — The Battery Indicator is located at the bottom of the display
and bars indicate approximate battery level remaining.
l
ALARM SILENCE/SMART ALARM INDICATOR — When the Silent key is pressed the indica-
tor will display with cross bars to alert condition. When the Smart Alarm key is
pressed the indicator will display with T-bars to alert condition.
;
OXYGEN LOW ALARM LIMIT — Low oxygen alarm setpoint. Audible and visual alarms will
trigger when this limit is exceeded.
z
LOW ALARM INDICATOR — Low alarm symbol used for identifying the low alarm
setpoints and when a low alarm is triggered.
x
<18% ALARM INDICATOR — The <18% alarm indicator is located above the Low Alarm
Indicator digits. When the low alarm setting is set below <18%, the indicator will flash
each second to alert the operator of this special condition. See section 2.3.1 for setting
this low alarm condition.
c
LOW PRESSURE ALARM LIMIT — Low pressure alarm setpoint. Audible and visual alarms
will trigger when this limit is exceeded. Double dashes (--) indicates the alarm is
inactive.
1.7 Back View
b
BATTERY COMPARTMENT —TheMaxBlend 2+pis poweredbyfour“AA”alkaline batteries.
n
SENSOR CABLE — The cable connects the MaxBlend 2+p to the Max-550E Sensor.
m
SENSOR WITH DIVERTER — The sensor with flow diverter is designed to fit into a port
behind the flowmeter.
,
O2 SENSOR PORT — A sampling port for the oxygen sensor. It allows mixed gas from the
blender to flow over the sensor membrane.
.
PRESSURE DIFFERENTIAL REED ALARM — An audible alarm which, when activated,
indicates that an unacceptable pressure differential exists between the two gas source
pressures.
/
AUXILIARY MIXED GAS OUTLET — The outlet can be used as power take off.
Q
AUXILIARY MIXED GAS OUTLET — The outlet can be used to add additional flowmeters.
W
MOUNT ADAPTER — An adapter which allows the MaxBlend 2+p to be mounted onto a
bracket for attaching to a rail or ventilator system.
E
EXTERNAL POWER SUPPLY PORT — The port provides connection for the external power
adapter. See section 2.7 for more information on the power supply.
1.8 Requirements for Operating the Blender
PRESSURIZED OXYGEN: The compressed oxygen source must provide clean, dry, medical-
grade oxygen at the pressure specified in Section 8.0.
PRESSURIZED AIR: The compressed air source must provide clean, dry, medical-grade air at
the pressure specified in Section 8.0.
2.0 OPERATING PROCEDURES
2.1 Setup and Installation
2.1.1 Battery Installation
All MaxBlend 2+p units are powered by four “AA” alkaline batteries (4 x 1.5 Volts) and are
shipped without the batteries installed. Only name-brand batteries should be used. Batteries
should be replaced by trained service personnel.
To install the batteries:
Open the battery drawer by squeezing inward on both tabs as shown in the figure below.
If you have difficulty squeezing the tabs in with your fingers, use two flat screwdrivers or
two coins. Remove the battery drawer completely from the MaxBlend 2+p. Install four new,
“AA” alkaline batteries into the unit, observing the orientation shown on the plastic inside the
drawer. Slide the drawer back in with the batteries facing upward. Press in on the drawer until
both tabs latch into place.
When batteries are replaced, the unit will start up and perform an automatic calibration.
Ensure calibration is performed as directed in Section 2.8.
WARNING: Battery replacement by inadequately trained personnel could result in a
safety hazard.
60
50
40
30
21
70
80
90
100
%O2
v b
.
n
m
,
/
Q
W

ENGLISH 8WWW.MAXTEC.COM • [phone]
WARNING: Electrical shock or damage to the equipment may occur if an inappropri-
ate external power supply is used. Maxtec recommends using only the Maxtec MaxBlend 2+p
External Power Supply—R230P10.
BATTERY ICON : The battery bars indicate the approximate remaining power in the
batteries.
Indicator Battery Level
(Outline flashing)
(1 bar flashing)
100%
80%
60%
40%
20%
0%
(Outline flashing + E04)
2.1.2 Adjusting Alarm and Calibration
Modes
You must select oxygen or pressure mode prior to adjusting alarms or performing a
calibration/zero. To set the device mode:
1. Unlock the device by pressing the unlock key.
2. Once unlocked the display will flash and you can toggle either oxygen or
pressure mode by pressing the power/mode key.
3. The respective alarms and calibration may now be performed.
Press unlock key
Press mode key to
select oxygen (O2)
or pressure (P)
Set alarms or
calibrate for
oxygen
Set alarms or
zero for
pressure
P
PRESSURE
O2
OXYGEN
2.1.3 MaxBlend 2+p Setup
1. Connect the pressurized air source to the Air Inlet Connector.
2. Connect the pressurized oxygen source to the O2 Inlet Fitting.
3. Flush gas at the highest possible flow rate through the blender for at least one minute
to eliminate any particulate that may have been introduced into the system during
handling and installation.
2.1.4 Sensor Installation
1. Attach the flow diverter onto the oxygen sensor.
2. Place the sensor into the sensor port located behind the flowmeter.
3. Attach the sensor cable directly to the sensor and the sensor jack on the back of the
monitor enclosure. Ensure the cable is fully inserted into both connections.
4. Calibrate the sensor prior to use according to the calibration procedures in section 2.8
2.2 Monitoring
Before use on a patient, the oxygen concentration of the delivered gas should be checked at
the setting intended for use.
1. To begin monitoring, press the ON/OFF key located on the front panel. Monitoring
will begin immediately.
2. Should oxygen level exceed either the HIGH or LOW alarm set points, the alarm indicator
on the front panel will illuminate indicating either a high or low oxygen condition. The
alarm will cease when oxygen levels are within limits, or the limits are adjusted.
NOTE: The MaxBlend 2+p will monitor the oxygen concentration of the gas delivered from
the blender regardless of which outlet port is in use. Therefore, the integrated flowmeter has
ultimately no effect on the oxygen sensing.
2.3 Alarm Setting Procedure
2.3.1 Low Alarm Setting
To adjust the low alarm setting:
1. Press the Unlock key to unlock the keypad. Note the LOW, SMART ALARM, CAL, and
HIGH icons will begin to flash indicating the SET OPERATING MODE.
2. Press the DOWN (Low Alarm) key on the keypad.
Select oxygen or pressure by pressing the power/mode key .
NOTE: The Low Alarm digits begin to flash indicating the Low Alarm manual setting.
3. Use the UP and DOWN keys to set the low alarm to the desired value.
Pressing the arrow keys changes the value in 1% or 1 cmH2O increments. If the keys are
held down for more than 1 second the display will scroll at a rate of 1% or 1 cmH2O per
second.
NOTE: If 30 seconds elapse between key actuations, the system will store the latest low alarm
setting and will revert to normal operation. If this occurs inadvertently, simply repeat the
alarm setting procedure.
There is a special condition that allows the low oxygen alarm to be set below 18%. To access
this condition, press the DOWN arrow key for three seconds while the low alarm reading dis-
plays 18%. The alarm setting can now be adjusted to 17, 16, or 15%. A bar will blink above the
setting to provide further indication that the alarm has been set to this special <18% condition.
The low alarm value cannot be set lower than 15%, nor can it be set closer than 1% from the
high alarm value. For example, if the high alarm is set at 25%, the system will not accept a low
alarm setting greater than 24%.
When the low alarm value is set, press the Unlock key again to accept the low alarm setting
and return to normal operation.
NOTE: The default low alarm setting is 18% O2 and off (––) for pressure. Removing the batter-
ies or shutting the unit OFF will reset the low alarm limit to 18% if it is set to <18%.
2.3.2 High Alarm Setting
To adjust the high alarm setting:
1. Press the Unlock key to unlock the keypad. Note the LOW, SMART ALARM, CAL and HIGH
icons will begin to flash indicating the SET OPERATING MODE.
Select oxygen or pressure by pressing the power/mode key .
2. Press the UP (High Alarm) key on the keypad.
NOTE: The High Alarm digits begin to flash indicating the High Alarm manual setting.

WWW.MAXTEC.COM • [phone] 9ENGLISH
3. Use the UP and DOWN keys to set the high alarm to the desired value. Pressing the
arrow keys changes the value in 1% or 1 cmH2O increments. If the keys are held down
for more than 1 second the display will scroll at a rate of 1% or 1 cmH2O per second.
NOTE: If 30 seconds elapse between key actuations, the system will store the latest high alarm
setting and will revert to normal operation. If this occurs inadvertently, simply repeat the
alarm setting procedure.
4. When the high alarm setting is set above 100% or 60 cmH2O the high alarm will
indicate two dashes - -. This special condition turns off or deactivates the high alarm.
5. When the high alarm value is set, press the Unlock again to accept the high alarm
setting and return to normal operation.
NOTE: The default high alarm setting is 50% oxgyen and 15 cmH2O pressure. Removing the
batteries will reset the high alarm limits to 50% and 15 cmH2O.
2.3.3 Smart Alarm Mode
NOTE: Smart alarms function as alarm guardrails which simultaneously set the low and high
alarms to ± 3% oxgyen or ± 2 cmH2O of the current oxygen or pressure reading. This range can
be broadened by pressing the up button or narrowed by pressing the down button.
1. Press the Unlock Key to unlock the keypad. Note the LOW, SMART ALARM, CAL, and
HIGH icons will begin to flash indicating the SET OPERATING MODE.
Select oxygen or pressure by pressing the power/mode key .
2. Press the Smart Alarm key on the keypad. Note the LOW digits, Alarm Mode and
HIGH digits begin a slow flash indicating SMART ALARM MODE. current reading +3% or +2
cmH₂0 (rounded to the nearest interger). The low alarm will now be set to be equal to the
current reading -3% or -2 cmH₂0 (rounded to the nearest integer but never lower than 18%).
3. Pressing of the UP key will add 1% to the high alarm setting and subtract 1%
from the low alarm setting. Pressing the DOWN key will subtract 1% from the
high alarm setting and add 1% to the low alarm setting. In other words, the UP key
widens the alarm band and the DOWN key tightens the alarm band. This feature will
not set the alarm levels above 100% or below 18% for oxygen or above 60 cmH2O or
below 1 cmH2O for pressure.
4. Once the desired alarm settings are attained, press the Unlock key again to save
the settings and return to normal operation mode. If 30 seconds elapse without a
key press by the user, the device will automatically save the latest alarm settings and
return to normal operation mode.
2.3.4 Pressure Monitoring and Alarms
The monitor displays the mean pressure using a 2 second average. Pressure monitoring
begins immediately once the device is powered on. The device will activate an audible and
visual (LED) alarm whenever the alarm limits are exceeded, however the pressure alarms are
delayed by 3 seconds to allow for momentary fluctuations in pressure and reduce unnecessary
alarm disturbances.
By default, the pressure alarms are set to off (--) for the LOW alarm and and 15 cmH2O for the
HIGH alarm. Pressure alarms are automatically saved in the device memory and recalled to the
last settings whenever the device is powered on/off. Alarm default setpoints are only reset by
removing and re-installing the batteries.
2.4 Basic Operation
To check the oxygen concentration of the delivered gas:
1. Ensure the sensor is connected to the flow diverter and inserted completely in the
sensor port behind the flowmeter.
2. Set the oxygen blender control knob to the desired oxygen setting.
3. Using the ON/OFF key , make sure the unit is in the power on mode.
4. Allow the oxygen reading to stabilize.
5. Adjust the flowmeter to the desired flow rate. Read the flow rate at the center of the float ball.
2.4.1 Pressure Monitoring Operation
The monitor measures pressure using pressure monitoring line with moisture control tubing
(pressure monitoring line) that includes an inline filter. The filter protects the monitor from
moisture and reduces the risk of cross contamination. The pressure monitoring line is intended
to be used on an individual patient during a single procedure then disposed of. The pressure
monitoring line must be discarded and replaced between each patient and procedure. When
in use on a single patient in an ongoing procedure, it must be discarded and replaced every 30
days or sooner. The pressure monitoring line is NOT intended to be reprocessed.
To begin pressure monitoring:
1. Perform a zero calibration if the monitor displays a non-zero pressure reading. (See
Section 2.8.3)
2. Locate the pressure monitor port on the device and push in the connector of pressure
monitoring line until it clicks into place.
3. Locate and attach the other end of the pressure monitoring line into the circuit to be
monitored using the Luer connector.
4. Adjust the low and high pressure alarms to the desired range. Alternatively, the
pressure alarms may be set automatically using the smart alarm button.
5. The device will now monitor pressure between the set range.
WARNING: In order to reduce the potential issues associated with condensation in the
pressure monitoring line, the pressure monitoring line connector should be positioned at least
10 inches (25 cm) below the monitor.
WARNING: To reduce the risk of cross contamination, only single use pressure monitoring
line with an inline filter should be used with this device.
DO NOT allow liquids or debris to enter the pressure monitor port.
◆Replace the pressure monitoring line if condensation build-up occurs.
DO NOT use for pressure in excess of 60 cmH2O.
DO NOT connect pressure monitoring line to patient IV line.
◆Secure the pressure monitoring line to avoid kinks and unintended disconnects.
2.5 Alarm Conditions and Priorities
In the event of either a low alarm or high alarm condition, the corresponding LED will begin
to flash, accompanied by the audio buzzer. Pressing the Silent key will deactivate the
buzzer, but the LED and the alarm value digits on the display will continue to flash until the
alarm condition has been rectified. If the alarm condition still exists 120 seconds after silencing
the audio buzzer, the beeper will start to sound again.
An alarm condition will remain until the actual oxygen concentration or pressure is within the
alarm range.

ENGLISH 10 WWW.MAXTEC.COM • [phone]
To help differentiatethe levelof priority, the monitor providesthreeunique audible sequences.
ALARM ALARM
PRIORITY
LOW
ALARM
LED
HIGH
ALARM LED
AUDIBLE
ALARM
AUDIBLE
ALARM
REPEAT
Line Power
Plugged In Informational O O 2 Pulses No Repeat
Line Power
Unplugged Informational
Single
Yellow
Pulse
Single
Yellow
Pulse
2 Pulses No Repeat
External DC
Power Supply
Voltage Out
of Range
Informational Solid
Yellow
Solid
Yellow 2 Pulses Every 35 Sec.
No oxygen
sensor attached
(E02)
Medium Pulsing
Yellow
Pulsing
Yellow 3 Pulses Every 25 Sec.
Battery Voltage
too low for
device to
operate (E04)
Medium Pulsing
Yellow
Pulsing
Yellow 3 Pulses Every 25 Sec.
Oxygen/
pressure level
above the high
alarm setting
Medium O Pulsing
Yellow 3 Pulses Every 25 Sec.
Oxygen/
pressure level
below the low
alarm setting
Medium Pulsing
Yellow O 3 Pulses Every 25 Sec.
Oxygen level
below the low
oxygen alarm
setting and
lower than 18%
High Pulsing
Red O 5+5 Pulses Every 15 Sec.
2.5.1 Multiple Alarms
When multiple alarms occur the LOW or HIGH alarm LED will flash respectively along with the
numeric alarm values that have been triggered. If both a LOW and HIGH alarm are triggered at
the same time the highest priority LED and tone will be produced. The alarm LEDs and tones
will automatically default to the highest priority alarm. Alarms will automatically clear once
the reading has returned within the specified alarm window.
2.6 Backlight Operation
To turn on the backlighting:
1. When the unit is on, pressing the Backlight button will turn the backlighting on for 30
seconds. An additional press will turn off the backlighting.
2. If the device is being used in a dark location, any button press will activate the backlight.
CAUTION: Excessive use of the backlight can reduce the life of the batteries.
2.7 External Power Supply Operation
To extend the life of the batteries, an external Maxtec approved 7.5V DC external power supply can
be purchased. Once connected to the unit, total power is supplied by the power supply. Batteries
are still required in the unit and will provide emergency power in the event main AC power is lost.
NOTE: Use only the Maxtec external power supply described in section 10.0.
NOTE: The power supply is not a battery charger.
DO NOT use rechargeable batteries.
WARNING: Do not position the equipment in a way that it would be difficult to unplug the
power supply. Unplugging the power supply is the only means of disconnection or isolating
the equipment from AC mains power.
2.8 Calibration Procedures
2.8.1 Calibration to 100% Oxygen
The MaxBlend 2+p should be calibrated before being placed into clinical use. Thereafter,
Maxtec recommends calibration of the unit on a weekly basis. Frequent calibration will have
no adverse effect on the performance of the MaxBlend 2+p. Calibration should also be per-
formed upon replacement of a sensor.
The sensor is best calibrated while mounted in the MaxBlend 2+p sensor port. As in normal
operation, the oxygen sensor responds best when installed in a vertical position with the sen-
sor facing down.
Changes in barometric pressure can affect the oxygen reading. A 1% change in the barometric
pressure results in an error of 1% of the actual reading. (Example: If you are reading a 50%
oxygen mix and the barometric pressure drops from 1000mbar to 990mbar the reading will
drop to 50% x (990/1000) = 49.5%). Maxtec recommends that you recalibrate after changing
point-of-use elevation by more than 500 feet (150m).
It is best to calibrate the MaxBlend 2+p using the sensor port with a technical grade oxygen
standard (99.0% or better). Calibration of the unit with room air is less accurate over the full
FiO2 operating range.
Calibration is recommended if the user is unsure when last calibration procedure was
performed or if the measurement value displayed is in question.
To calibrate to 100% oxygen:
1. Connect the oxygen supply line (pressure differential alarm may sound). Verify the
sensor is plugged into the O2 sensor port and connected to the sensor cable. DO NOT
connect air supply line at this time.
2. Using the ON/OFF key , make sure the MaxBlend 2+p is in the power on mode.
3. Rotate the FiO2 control knob to the 100% stop. Allow a few minutes for the reading to
stabilize.
4. Press the Unlock key to unlock the keypad. Note the LOW, SMART ALARM, CAL, and
HIGH icons will begin to flash indicating the SET OPERATING MODE. Verify device is in O2
mode.
5. Press the Calibration key on the keypad. The word “CAL” will appear on the
display for approximately 5 seconds and then finish with 100.0%.
6. The unit is now calibrated and in the normal operating mode.
2.8.2 Calibration to Room Air
The MaxBlend 2+p can quickly be calibrated to room air (20.9%).
To calibrate to room air:
1. Connect the air supply line (pressure differential alarm may sound). Verify the sensor
is plugged into the O2 sensor port and connected to the sensor cable DO NOT
connect oxygen supply line at this time. (If preferred, room-air calibration may be
performed by removing the sensor from the O2 sampling port and detaching the flow
diverter. If using this method, the gas-supply lines may remain attached.)
2. Using the ON/OFF key , make sure the MaxBlend 2+p is in the power on mode.
3. Rotate the FiO2 control knob to the 21% stop. Allow a few minutes for the reading to
stabilize.
4. Press the Unlock key to unlock the keypad. Note the LOW, SMART ALARM, CAL and
HIGH icons will begin to flash indicating the SET OPERATING MODE. Verify device is in O2
mode.

WWW.MAXTEC.COM • [phone] 11 ENGLISH
5. Press the Calibration key on the keypad. The word “CAL” will appear on the
display for approximately 5 seconds and then finish with 20.9%.
6. The unit is now calibrated and in the normal operating mode.
2.8.3 Zero Calibration
A zero calibration resets the zero point of the pressure sensor, the measurement when no
pressure is connected. Perform a zero calibration if the monitor displays a non-zero pressure
reading when no pressure is connected.
To zero the device:
1. Ensure no pressure is connected to the device and open to room air.
2. Unlock the device by pressing the unlock key .
3. Select pressure mode by pressing the power/mode button until is shown on the
display.
4. Press the CAL/0 button. The display will flash '0.0' until the zeroing has been
completed.
5. Verify the pressure display reads 0.0 cmH2O once zeroing is complete.
2.9 Flowmeter Operation
1. Adjust the flowmeter to the desired setpoint as read by the center of the float ball.
•To increase flow—turn knob counter-clockwise
•To decrease flow—turn knob clockwise
2. Check the toggle bleed switch to ensure it is in the appropriate position.
•For a low flow blender the bleed toggle switch should be turned on (up position) if
the total combined flow from the blender is less than 3LPM.
•For a high flow blender the bleed toggle switch should be turned on (up position)
if the total combined flow from the blender is less than 15LPM.
•At delivered flows greater than the above limits, the bleed toggle switch can be
turned off (down position) to conserve gas.
CAUTION: Failure to activate the bleed as described above may result in inaccurate
oxygen concentrations from the blender. However, the MaxBlend 2+p will always display the
actual delivered concentration.
CAUTION: The outlets of this device are capable of delivering pressure as high as the inlet
pressure. Ensure that the devices that carry the gas from the blender to the patient prevent
excessive pressure to the patient.
3.0 PERFORMANCE CHECK
Prior to placing the MaxBlend 2+p into clinical use, perform the following tests.
WARNING: If the MaxBlend 2+p does not function as described on the next page, contact
your Maxtec Distributor or contact a Maxtec Certified Service Technician at:
Maxtec
2305 South 1070 West
Salt Lake City, UT 84119
[phone] or [phone]
DO NOT use the MaxBlend 2+p until correct performance has been verified.
3.1 Blender Safety Check
NOTE: Before proceeding, ensure that the high oxygen alarm set point control is OFF [display
reads (--)], and that the low oxygen alarm set point control is below 20%.
PROCEDURE BLENDER RESPONSE
1. Connect the blender to 50 ±5 PSIG air/oxygen gas
sources. Adjust the blender control knob to 60%.
Turn the bleed toggle switch on (up position) and
adjust the flowmeter to a minimum of 2 LPM.
No response. Monitor
display reads 60% ±3%.
PROCEDURE BLENDER RESPONSE
2. Disconnect the 50 PSIG AIR source
from the MaxBlend 2+p.
NOTE: The blender must be flowing
gas for the alarm to activate.
Audible alarm sounds. Monitor
display reads 100% ±3%.
3. Reconnect 50 PSIG AIR source to the
MaxBlend 2/MaxBlend 2+p.
Audible alarm stops.
Verify the monitor display
reads 60% ±3%.
4. Disconnect 50 PSIG OXYGEN source
from the MaxBlend 2+p.
Audible alarm sounds. Monitor
display reads 20.9% ±3%.
5. Reconnect 50 PSIG OXYGEN to the MaxBlend 2+p.
Audible alarm stops.
Verify the monitor display
reads 60% ±3%.
6. Adjust both air and oxygen inlet regulators to 0 PSIG. No response.
7. Remove air inlet hose at regulator and
insert end into beaker of water. No response.
8. Slowly raise pressure of oxygen regulator
to 50 PSIG and back to 0 PSIG while
observing air hose end in beaker.
No bubbles should
be observed. Audible
alarm sounds.
9. Dry and reattach air inlet hose to regulator. No response.
10. Remove oxygen inlet hose at regulator,
and insert end into beaker of water. No response.
11. Slowly raise pressure of air regulator to
50 PSIG and back to 0 PSIG while observing
oxygen hose end in beaker.
No bubbles should
be observed. Audible
alarm sounds.
12. Dry and reattach oxygen inlet hose to regulator. No response.
4.0 PRESSURE MONITOR TESTS
4.1 Pressure Monitor Accuracy Test
A Pressure Monitor Accuracy Test is recommended annually to verify performance of the pres-
sure monitor. The process involves applying a known pressure to the device and confirming
the readings using a calibrated manometer (pressure gauge). Use a calibrated manometer
with accuracy ≤±0.5 cmH2O.
1. Turn the device on and zero the pressure reading. (See Section 2.8.3)
2. Use a clean syringe with a 4-way stopcock or tee and create the test setup shown.
3. Slowly apply pressure with the syringe to several test points across the range of
pressure measurement. WARNING: Do not exceed 60 cmH2O. Over pressurizing the
device may result in permanent damage to the pressure sensor.
4. The readings between the device and the calibrated manometer should be within
±1.0cmH2O. Contact Maxtec technical service if the device fails to function as expected.

ENGLISH 12 WWW.MAXTEC.COM • [phone]
5.0 TROUBLESHOOTING
PROBLEM: Oxygen concentration discrepancy between oxygen concentration selection knob
and actual reading on display, greater than 3%.
POTENTIAL CAUSES AND SOLUTIONS:
•Bleed is turned off. Turn bleed toggle switch on. Refer to section 2.9, Flowmeter
Operation.
•Monitor out of calibration. Calibrate. Refer to section 2.8, Calibration Procedure.
•Sensor exhausted. Replace sensor. Refer to section 6.2.
•Gas supply contaminated. Contact Maxtec for repair of the MaxBlend 2/MaxBlend 2+p.
•Blender out of calibration. Contact Maxtec for repair.
PROBLEM: Pressure differential alarm sounding.
POTENTIAL CAUSES AND SOLUTIONS:
•Inlet pressure differences of 20 PSI or more. Correct pressure difference.
•Pressure alarm not calibrated properly. Contact Maxtec for repair.
•MaxBlend 2+p blender operation out of calibration. Contact Maxtec for repair.
PROBLEM: Inlet pressure has supply loss, no audible pressure differential alarm.
POTENTIAL CAUSES AND SOLUTIONS:
•Reed alarm cap damaged or defective. Contact Maxtec for repair.
PROBLEM: Selected oxygen concentration accurate only when gas pressures are equal.
POTENTIAL CAUSES AND SOLUTIONS:
•MaxBlend 2+p balance module not functioning properly. Contact Maxtec for repair.
PROBLEM: Blank display.
POTENTIAL CAUSES AND SOLUTIONS:
•Batteries not installed. Install batteries. Refer to section 2.1.1, Battery Installation.
•Battery completely dead. Replace batteries. Refer to section 2.1.1, Battery Installation.
•Monitor defective. Contact Maxtec for repair.
PROBLEM: Partial or distorted display.
POTENTIAL CAUSES AND SOLUTIONS:
•Monitor damaged. Contact Maxtec for repair.
PROBLEM: Sensor will not calibrate.
POTENTIAL CAUSES AND SOLUTIONS:
•Sensor cell exhausted. Replace sensor. Refer to section 6, Replacing O2 sensor.
•Sensor cable defective. Return to Maxtec.
•Monitor defective. Contact Maxtec for repair.
PROBLEM: Sensor will calibrate, but takes too long or does not return to 21% ±2% oxygen in air
(2 to 5 minutes) when performing calibration.
POTENTIAL CAUSES AND SOLUTIONS:
•Disposable oxygen sensor damaged or defective. Replace sensor. Refer to section 6.2,
Replacing O2 sensor.
PROBLEM: Sensor will calibrate, but reading at any constant level drifts more than ±3% over
a 24 hour period.
POTENTIAL CAUSES AND SOLUTIONS:
•Barometric pressure change since last calibration. Recalibrate. Refer to section 2.8,
Calibration Procedures.
•Room or gas temperature went below 59°F (15°C) or above 104°F (40°C). Correct
temperature and recalibrate.
PROBLEM: Low battery icon.
POTENTIAL CAUSES AND SOLUTIONS:
•If, at any time, the low battery icon is displayed on the LCD readout, the batteries
should be replaced as quickly as possible.
PROBLEM: E01: Sensor voltage is too low to perform a valid calibration.
POTENTIAL CAUSES AND SOLUTIONS:
•Manually attempt a new calibration. Refer to section 2.8, Calibration Procedures.
•If unit repeats this error more than three times, contact Maxtec’s Customer Service
Department for possible sensor replacement.
PROBLEM: E02: No sensor attached.
POTENTIAL CAUSES AND SOLUTIONS:
•Disconnect the sensor and reconnect, making sure the male plug is fully inserted into
the receptacle. The analyzer should now perform a new calibration with the error
cleared.
•If the error still persists, remove the batteries, wait 30 seconds, then reinstall, to
perform a factory reset and diagnostic on the analyzer. The analyzer should again
perform a new calibration with the error cleared.
•Contact Maxtec Customer Service Department if the error code cannot be cleared.
PROBLEM: E03: No valid calibration data available.
POTENTIAL CAUSES AND SOLUTIONS:
•Make sure unit has reached thermal equilibrium and perform a calibration routine.
Refer to section 2.8, Calibration Procedures.
PROBLEM: E04: Battery below minimum operating voltage.
POTENTIAL CAUSES AND SOLUTIONS:
•Replace batteries. A medium priority alarm will sound every 25 seconds until the
batteries are replaced or become too dead to sound the alarm. Refer to section 2.1.1,
Battery Installation.
PROBLEM: E05: Sensor voltage is too high to perform a valid calibration.
POTENTIAL CAUSES AND SOLUTIONS:
•Manually attempt a new calibration. Refer to section 2.8, Calibration Procedures.
•If unit repeats this error more than three times, contact Maxtec’s Customer Service
Department for possible sensor replacement.
PROBLEM: E06: Non-compatible oxygen sensor.
POTENTIAL CAUSES AND SOLUTIONS:
•Disconnect the sensor and reconnect, making sure the male plug is fully inserted into
the receptacle. The analyzer should now perform a new calibration with the error
cleared.
•If the error still persists, remove the batteries, wait 30 seconds, then reinstall, to
perform a factory reset and diagnostic on the analyzer. The analyzer should again
perform a new calibration with the error cleared.
•Contact Maxtec Customer Service Department if the error code cannot be cleared.
PROBLEM: E07: Sensor signal is not stable enough to perform a valid calibration.
POTENTIAL CAUSES AND SOLUTIONS:
•Wait for displayed oxygen reading to stabilize when calibrating the device at 100%
oxygen.
•Wait for unit to reach thermal equilibrium. Please note that this can take up to one
half hour, if the device is stored in temperatures outside the specified operating
temperature range.
PROBLEM: E08: Battery voltage is too low to perform a valid calibration.
POTENTIAL CAUSES AND SOLUTIONS:
•Replace batteries. Refer to section 2.1.1, Battery Installation.
E09: Pressure out of range, too high. The pressure applied to the monitor port has exceeded
the device maximum pressure. Remove the pressure or adjust within the allowable range.
E10: Pressure out of range, too low. The pressure applied to the monitor port has exceeded the
device minimum pressure. Remove the pressure or adjust within the allowable range.
E11: Pressure zero calibration unstable. Ensure pressure is stable and attempt a new zero cali-
bration. If error persists, contact Maxtec technical service.

WWW.MAXTEC.COM • [phone] 13 ENGLISH
E12: Pressure CAL/0 out of range.
E13: Pressure sensor error. No valid pressure sensor data. Remove batteries from device to
reset and perform a new CAL/0. If error persists, contact Maxtec technical service.
NOTE: Use only the Maxtec-approved Max-550E sensor described in section 11.0, Spare Parts
and Accessories. The Max550E sensor is equipped with an authentication chip to ensure the
monitor is used with an approved sensor.
NOTE: The operator must be facing the device and positioned within 4 meters to distinguish
the visual alarm indicators. Audible alarms can be distinguished as long as the operator is in
the same room, and the ambient noise level is typical for a clinical setting.
6.0 CLEANING AND DISINFECTING
The external surfaces of the device, and its accessories, can be cleaned and disinfected using
the process detailed below. Under normal use conditions, the sensing surfaces of the sensor
should not become contaminated. If you suspect that the sensing face of the sensor or internal
surfaces of the flow diverter have become contaminated, these items should be discarded and
replaced. Store the device in a clean, dry location when not in use.
To clean and disinfect:
1. Ensure battery drawer is closed and sensor/diverter are inserted into their port.
2. Using disposable Super Sani-Cloth germicidal wipes (medical-grade 2-in-1 cleaning/
disinfecting wipes), remove all visible contamination from the external surfaces of the
device and its accessories. Be sure to closely inspect and remove contamination from
seams and recesses on the device that may trap contaminants. Wipe with clean paper
towel to remove debris and bioburden.
3. After all visible contamination is removed, use a second germicidal wipe to thoroughly
wet the surfaces of the device and accessories. Allow to remain wet for 4 minutes. Use
additional wipes, if needed, to assure surfaces are wetted continuously for 4 minutes.
4. Allow device to air dry completely.
5. Visually inspect the device for visible contamination. Repeat cleaning/disinfection
process if visible soil remains.
DO NOT allow the liquid or spray to penetrate the device.
DO NOT spray cleaning solution directly onto the sensor port, bleed muffler or buzzer
openings.
NOTE: Be sure to thoroughly clean and disinfect the areas depicted. These regions are
contacted during normal use and may contribute to cross contamination if not disinfected
properly. To prevent overcleaning, if sanitation is required, sanitization should be limited to
once between each patient use. Other necessary cleanings should be done with a germicidal
wipe or mild detergent and water
NOTE: The device should be discontinued from service if material degradation or cracking are
observed.
CAUTION: Excessive rubbing of labels may cause them to become illegible.
DO NOT immerse the device or sensor into liquid decontamination agents.
DO NOT use strong solvent cleaners.
DO NOT allow cleaning liquids to contact the face of the sensor as this may impair the
readings of the sensor.
DO NOT attempt to sterilize the device with steam, ethylene oxide or irradiation.
DO NOT allow liquids to enter the pressure monitor port.
7.0 SERVICE AND MAINTENANCE
7.1 Maintenance
Maxtec recommends that the Performance Check listed in section 3.0 is performed at least
once a year.
When using theMaxBlend 2+pwitha medical-grade compressed air source,itis recommended
that an air inlet watertrap/filter be attached to the air inlet of the MaxBlend 2+p prior to use.
Contaminants from hospital air lines may compromise the function of the MaxBlend 2+p.
Maxtec recommends that the MaxBlend 2+p be overhauled and serviced at a minimum of
every three years.
Repair of this equipment must be performed by a Maxtec Certified Service Technician experi-
enced in the repair of this device.
7. 2 Replacing O2 Sensor
The oxygen sensor is designed to operate for two years under normal use conditions. The
oxygen sensor should be replaced whenever any of the problems listed in section 4.0,
Troubleshooting dictate the need to do so.
To replace the O2 sensor:
1. Remove the sensor from the sensor monitor port.
2. Remove the sensor from the sensor cable.
3. Install a new O2 sensor with flow diverter and attach to the sensor cable.
4. Calibrate the sensor following the instructions for calibration listed in section 2.8.
7.3 Monitor Alarm Testing
•Testing of alarms should be performed on a yearly basis.
•To check the low alarm, adjust the low alarm setting to 23%, or higher, and expose the
sensor to room air (20.9%). The low alarm LED should flash with the alarm sound.
•To check the high alarm, adjust the low alarm setting to 17%, or lower, and the high
alarm setting to 18% and expose the sensor to room air (20.9%). The high alarm LED
should flash with the alarm sound. If one, or both alarms malfunction, contact a
Maxtec Certified Service Technician.
8.0 ABBREVIATION GUIDE
TERM DESCRIPTION
Air/O2 Mixture of compressed air and oxygen
°C Degrees Celsius
CGA Compressed Gas Association
DISS Diameter Indexed Safety System
°F Degrees Fahrenheit
FiO2 Fractional Concentration of Inspired Oxygen
O2 Oxygen
LPM Liters Per Minute
PSIG Pounds Per Square Inch Gauge
9.0 SPECIFICATIONS
9.1 Instrument Specifications
Weight (unpackaged)................................................................................................ 5.3 lbs. (2.4 kg.)
Power Source.......................................................................Four “AA” alkaline batteries, 1.5 V each

ENGLISH 14 WWW.MAXTEC.COM • [phone]
Power specification ..................................................................7.5V(MAX) 1.9W/250mA(MAX)
Battery Life..........................................................5000 hours (continuous operation, no alarming)
Expected Service Life................................................................................................................ 7 Years
Oxygen Measurement Range..............................................................................0% to 100% oxygen
Display Resolution............................................................................................................0.1% oxygen
O2 Concentration Adjustment Range........................................................................ 21% to 100% O2
Gas Supply Pressure.......................The gas supplies must provide clean, dry, medical-grade air
and oxygen at a pressure of 30 to 75 PSIG (2.0 to 5.2 BAR).
Air and oxygen must be within 20 PSI (1.3 BAR). Optimal
performance is achieved at 50 PSIG inlet pressures.
Pressure Drop ........................................................Less than 6 PSIG (0.4 BAR) @ 50 PSIG (3.4 BAR)
supply pressures and 10 LPM flow rate
Sensor Bleed Flow.................................................................................. 0.1LPM @ 50 PSIG (3.4 BAR)
Bleed Flow (toggle ON) .................3 LPM for low flow blender and 13 LPM for high flow blender
Outlet Flow Range............................0-30 LPM for low flow blender and 2-100 LPM for high flow
blender with inlet pressures at 50 PSIG (3.4 BAR)
Mixed Gas Stability* Ambient Operating Conditions..................................................... ±1% oxygen
Operating Temperature Range..............................................................59°F to 104°F (15°C to 40°C)
Relative Humidity Range.............................................................................0-95%, non-condensing
Ambient Storage Conditions Temperature Range................................ 5°F to 122°F (-15°C to 50°C)
Flowmeter accuracy** .......................+/-10% of indicated value or 0.5 LPM whichever is greater,
with inlet pressure set to 50PSIG.
*The delivered oxygen concentration will remain constant within ±1% of the set point value
with constant inlet pressures. The displayed value may vary more than this due to sensor
accuracy, age, environmental conditions, and the length of time since last sensor calibration.
**Position the device such that the flowmeters are vertical to ensure accuracy.
9.2 Pressure Monitor Specifications
Pressure measurement range............................................................................. -15.0 - 60.0 cmH2O
Display resolution.................................................................................................................0.5 cmH2O
Pressure Accuracy.............................................................................................................. ±1.0 cmH2O
High Pressure Alarm Range......................................................................................1-60 cmH2O, Off
Low Pressure Alarm Range........................................................................................Off, 1-30 cmH2O
Pressure Alarm Resolution......................................................................................................1 cmH2O
9.3 Alarm Specifications
Pressure Differential Alarm Activation............................When supply pressures differ by 20 PSI
(1.3 BAR) or more alarm is activated
Low Oxygen Alarm Range....................................................15%-99% (>1% lower than high alarm)
High Oxygen Alarm Range......................... 16%-100% (>1% higher than low alarm) (according to
IEC 60601-1-8 Audible Alarms in Medical Equipment)
Alarm Volume (all priorities)...............................................................72 dB(A) ± 7 dB(A) at 1 meter
9.4 O2 Sensor Specifications
Total accuracy* ......................... ±3% actual oxygen level over full operating temperature range
Oxygen Measurement Accuracy...................................................................................... ±1% oxygen
Linearity.......................................................................± 1% at constant temperature and pressure
Error Over Operating Temp Range ............................................................. ±3% oxygen, maximum
Response Time to 90% of Final Reading*............................................ @ 77°F (25°C) ≤20 seconds
Storage Temperature Range................................................................... 5°F to 122°F (-15°C to 50°C)
Expected Useful Life......................................1,500,000 O2% hours (approx. 2 years average use)
*The accuracy of the oxygen monitor is not affected by supply gas inlet pressure to the
blender, however, pressures below 50 PSIG may result in a longer response time.
NOTE: All specifications assume the following standard environmental conditions, unless
specified otherwise:
•Ambient and sample gas temperatures of 77°F (25°C)
•Barometric pressure of 30 inHg (102 kPa)
•Ambient relative humidity of 50%
•Sample gas relative humidity of 0%
10.0 FACTORS INFLUENCING CALIBRATION
10.1 Temperature Effect
The MaxBlend 2+p Monitor will hold calibration and read correctly within +/-3% when in ther-
mal equilibrium within the operating temperature range.
The device accuracy will be better than +/-3% if operated at the same temperature at which
it was calibrated. The device must be thermally stable when calibrated and allowed to ther-
mally stabilize after experiencing temperature changes before reading is accurate. For these
reasons, the following is recommended:
1. Allow adequate time for the sensor to equilibrate to a new ambient temperature.
Please note that this can take up to one half hour, if the device is stored in
temperatures outside the specified operating temperature range.
2. For best results, perform the calibration procedure at a temperature close to the
temperature where analysis will occur.
10.2 Pressure Effect
Changes in barometric pressure can affect the oxygen reading. A 1% change in the barometric
pressure results in an error of 1% of actual reading (Example: If you are reading a 50% oxygen
mix and the barometric pressure drops from 30kPa to 29kPa, the reading will drop to: 50% x
(29/30) = 48.3%. Maxtec recommends that you recalibrate after changing point-of-use eleva-
tion by more than 500 feet (150m).
10.3 Humidity Effect
Humidity in the sample gas will affect the oxygen reading. Maxtec recommends that the gas
delivered to the MaxBlend 2+p be medical-grade, clean, and dry. Refer to ISO 7396-1 for further
details.
10.4 Exposure to Anesthetic Gases
Because of the unique chemistry of the oxygen sensors provided with the MaxBlend 2+p, there
are no significant effects when exposed to commonly used anesthetic gases; however, the
monitor is not designed for exposure to flammable gas mixtures (See WARNING page 2).
INTERFERENT VOLUME % DRY INTERFERENCE IN O2%
Nitrous Oxide 60%, balance O2 <1.5%
Halothane 4% <1.5%
Enflurane 5% <1.5%
Isoflurane 5% <1.5%
Helium 50%, balance O2 <1.5%
Sevoflurane 5% <1.5%
Desflurane 15% <1.5%
NOTE: Balance mixture 30% O2/70%N2O, unless otherwise specified.
11.0 SPARE PARTS AND ACCESSORIES
DESCRIPTION PART NUMBER
MAX550E Oxygen Sensor R140P02-001
ACCESSORIES DESCRIPTION
Sensor Cable R228P49
Adjustable Pole Mount Bracket R100P22
Pole Mount Bracket R100P26
Large Wall Mount, Dovetail Bracket RP05P09
Compact Wall Mount, Dovetail Bracket RP05P07
Maxtec-Approved External Power Supply R230P10
Wall Mount Large Bracket RP05P09
10’ Dual Blender hose (DISS) R129P01

WWW.MAXTEC.COM • [phone] 15 ENGLISH
Pressure Monitoring Line with Moisture Control Tubing (Qty 15) R229P18-015
Repair of this equipment must be performed by a Maxtec Certified Service Technician,
experienced in the repair of this device.
Equipment in need of repair shall be sent to:
Maxtec
Service Department
2305 South 1070 West
Salt Lake City, Ut 84119
1.800.748.5355
(Include RMA number issued by Customer Service)
12.0 THEORY OF OPERATION
12.1 Operational Diagram
O2
2nd Stage
Balance Module
Alarm/Bypass
Mixed Gas OutletAir InletAudible AlarmOxygen Inlet
Mixed Gas Outlet
to Flowmeter
Sensor Bleed
Manifold
1st Stage
Balance Module
Proportioning
Valve
12.2 Mixing Operation
The MaxBlend 2+p is designed to utilize two 50 PSIG (3.4 BAR) gas sources. The two gas sources
enter through the air and oxygen inlet connectors located on the bottom of the MaxBlend 2+p.
Each inlet connector incorporates a 30 micron particulate filter. Once through the filters, each
gas passes through a duckbill check valve, which prevents possible reverse gas flow from
either the air or the oxygen supply systems.
The two gases then pass through a two-stage balance regulator. The purpose of this regulator
is to equalize the operating pressures of the air and oxygen gas sources. Once these pressures
have been balanced, the gases are proportioned according to the oxygen concentration
selected on the oxygen concentration selection knob. The oxygen concentration knob allows
the clinician to select a desired oxygen concentration from 21% to 100% O2. From this point, the
mixed gas flows to the outlet port.
12.3 Gas Outlet
There are three gas outlets on the MaxBlend 2+p. One is a fixed acrylic flowmeter, the other
two are auxiliary ports (one on the bottom of the unit, and one on the right side). These
outlets are capable of delivering combined metered flows of 0-30 LPM for the low flow model
and 0-120 LPM for the high flow model. The auxiliary outlet ports are fitted with an automatic
shut-off valve. The flow of gas from either outlet port is automatically initiated by attaching a
pneumatic device (such as a flowmeter) to the outlet port.
Regardless of whether or not the outlet has any device connected to it, a minimal gas bleed
flow of 0.1 LPM flows from the MaxBlend 2+p sensor port on the left side of the blender. It is
from this bleed flow that the gas is analyzed by the oxygen sensor. In addition, a toggle switch
is provided allowing the user to activate an additional gas bleed, which ensures the blender
has sufficient flow to function accurately when the total flow delivered to the patient is below
a certain minimum threshold. For a low flow model, this additional bleed should be activated
if the total flow delivered to the patient is less than 3 LPM.
For a high flow model, the additional bleed should be activated if the total flow delivered to
the patient is less than 15 LPM. At delivered flows greater than these limits, the bleed toggle
can be deactivated to conserve oxygen.
CAUTION: Failure to activate the bleed as described above may result in significant drift
in the oxygen concentration delivered to the patient.
12.4 Alarm/Bypass Function
The MaxBlend 2+p includes a pressure differential alarm which provides an audible alarm if gas
source pressures differ by 20 PSI (1.3 BAR) (nominal) or more, or if there is a gas supply failure of
one of the source gases. This alarm is generated by a reed alarm located in a cap on the bottom
of the MaxBlend 2+p.
The primary purpose of the alarm is to audibly warn the operator of an excessive pressure
drop or depletion of either source gas pressure. Should both gas pressures increase or decrease
simultaneously, an alarm will not activate.
If either source gas pressure drops, the outlet pressure will drop similarly, as the mixed gas is
always balanced to that of the lower gas source.
The gas bypass function operates in unison with the alarm. Once the pressure alarm is activated,
the bypass function is actuated and the gas with the higher pressure flows directly to the outlet
port, bypassing the mixing function of the MaxBlend 2+p. The oxygen concentration flowing out
of the MaxBlend 2+p will be that of the gas with the higher pressure. In the alarm/bypass mode,
the blender will deliver oxygen (100%) or medical air (21%) until pressures have been restored to
a differential of 6 PSI or less (0.4 BAR).
If the MaxBlend 2+p is set to deliver 21% and the OXYGEN source pressure is reduced enough to
produce a 20 PSI (1.3 BAR) differential, the unit may not alarm because it will continue to deliver
21% concentration according to the setting. If the setting is moved slightly from 21%, the pressure
differential alarm will sound. Similarly, if the MaxBlend 2+p is set to deliver 100% and the AIR
source pressure is reduced or lost, the unit may not alarm because it will continue to deliver 100%
concentration.
13.0 FLOW CHARACTERISTICS
The outlet pressure of the MaxBlend 2+p decreases as the total flow rate increases. The total
flow rate is the measurement of the total flow from all outlet ports. The charts below indicate
the pressure drop that occurs for both low flow, and high flow, models at 3 inlet pressure
settings; 30 PSIG (2.07 BAR), 50 PSIG (3.45 BAR), and 75 PSIG (5.17 BAR).
The fixed acrylic flowmeter on the left side of the MaxBlend 2+p has been pressure
compensated to accommodate for the pressure loss through the blender at each flow rate,
using an inlet pressure of 50 PSIG.
Flow Rate -vs- Pressure Drop:
0
5
10
15
20
25
0 20 40 60 80 100 120
Pressure drop (PSIG)
Flow Rate (LPM)
30 psig
50 psig
75 psig
For High Flow Blender
0
5
10
15
20
25
0 5 10 15 20 25 30 35
Pressure drop (PSIG)
Flow Rate (LPM)
75 psig
50 psig
30 psig
For Low Flow Blender

ENGLISH 16 WWW.MAXTEC.COM • [phone]
14.0 ELECTROMAGNETIC
COMPATABILIT Y
The MaxBlend 2+p is suitable for the electromagnetic environment of typical hospital settings.
The user should assure that it is used in such an environment.
During the immunity testing described below the MaxBlend 2+p will monitor oxygen and pres-
sure within specification.
WARNING: Portable RF communications equipment (including peripherals such as
antenna cables and external antennas) should be used no closer than 30 cm (12 inches) to
any part of the MaxBlend 2+p, including cables specified by the manufacturer. Otherwise,
degradation of the performance of this equipment could result.
WARNING: The MaxBlend 2+p should not be used adjacent to or stacked with other equip-
ment. If adjacent or stacked use is necessary, the MaxBlend 2+p should be observed to
verify normal operation. If operation is not normal, the MaxBlend 2+p or the other equip-
ment should be moved.
WARNING: Use of accessories, transducers and cables other than those specified or
provided by the manufacturer of this equipment could result in increased electromag-
netic emissions or decreased electromagnetic immunity of this equipment and result in
improper operation.
WARNING: Avoid exposure to known sources of EMI (electromagnetic interference) such
as diathermy, lithotripsy, electrocautery, RFID (Radio Frequency Identification), and elec-
tromagnetic security systems such as anti-theft/electronic article surveillance systems,
metal detectors. Note that the presence of RFID devices may not be obvious. If such inter-
ference is suspected, reposition the equipment if possible, to maximize distances.
ELECTROMAGNETIC EMISSIONS
EMISSION TESTS COMPLIANCE ELECTROMAGNETIC ENVIRONMENT - GUIDANCE
RF Emissions
CISPR 11
Group 1 The MaxBlend 2+p uses RF energy only for its
internal function. Therefore, its RF emissions
are very low and are not likely to cause any
interference in nearby electronic equipment.
RF Emissions
CISPR 11
Class A The MaxBlend 2+p is suitable for use in all
establishments other than domestic, and may
be used in domestic establishments and those
directly connected to the public low-voltage
power supply network that supplies buildings
used for domestic purposes, provided the
following warning is heeded:
WARNING: This equipment/system is intended
for use by healthcare professionals only. This
equipment/ system may cause radio interference
or may disrupt the operation of nearby
equipment. It may be necessary to take mitigation
measures, such as re-orienting or relocating
the MaxBlend 2+p or shielding the location.
Harmonic Emissions
IEC 61000-3-2
Class A
Voltage fluctuations
/ flicker emissions
IEC 61000-3-3
Complies
ELECTROMAGNETIC IMMUNITY
IMMUNITY TEST COMPLIANCE LEVEL ELECTROMAGNETIC
ENVIRONMENT - GUIDANCE
Electrostatic
discharge (ESD)
IEC 61000-4-2
± 8kV contact
± 2, 4, 8 and 15kV air
Floors should be wood,
concrete or ceramic tile.
If floors are covered with
synthetic material, the
relative humidity should
be at least 30 %.
Electrical fast
transient / burst
IEC 61000-4-4
± 2 kV for power supply lines Mains power quality should be
that of a typical commercial
or hospital environment.
Surge IEC 61000-4-5 ± 1 kV dierential mode Mains power quality should be
that of a typical commercial
or hospital environment.
Voltage dips, short
interruptions and
voltage variations
on power supply
input lines IEC
61000-4-11
0% .5 Periods
0% 1 Period
70% 25 Periods
0% 5 sec
Mains power quality should be
that of a typical commercial
or hospital environment. If
the user of the MaxBlend
2+p requires continued
operation during power
mains interruptions beyond
that provided by the battery,
it is recommended that the
MaxBlend 2+p is powered
from an uninterruptible
power supply.
Power frequency
(50/60 Hz) magnetic
field IEC 61000-4-8
30A/m 50 and 60Hz Power frequency
magnetic fields should
be at levels characteristic
of a typical location in
a typical commercial or
hospital environment.
Radiated fields in
close proximity
IEC 61000-4-39
65 A/m at 134.2 kHz
(2.1 kHz PM, 50% duty cycle)
7.5 A/m at 13.56 MHz
(50 kHz PM, 50% duty cycle)
Avoid exposure to
known sources of EMI
(electromagnetic interference)
such as diathermy, lithotripsy,
electrocautery, RFID (Radio
Frequency Identification),
and electromagnetic security
systems such as anti-theft/
electronic article surveillance
systems, metal detectors.
Note that the presence of
RFID devices may not be
obvious. If such interference
is suspected, resposition
the equipment if possible
to maximize distances.
NOTE: UTis the A/C. mains voltage prior to application of the test level.

WWW.MAXTEC.COM • [phone] 17 ENGLISH
ELECTROMAGNETIC IMMUNITY
IMMUNITY TEST COMPLIANCE LEVEL ELECTROMAGNETIC
ENVIRONMENT - GUIDANCE
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz to 80 MHz
6 V rms in ISM bands
3 V/m
80 MHz to 2.7 GHz
The MaxBlend 2+p is suitable
for the electromagnetic
environment of typical
hospital settings.
The MaxBlend 2+p was also tested for radiated immunity to RF wireless communication
equipment at the test levels below.
Frequency (Hz) Modulation Level V/m
385 Pulse, 18 Hz, 50% DC 27
450 FM, 1 kHz Sine, ±5 Hz Deviation 28
710, 745, 780 Pulse, 217 Hz, 50% DC 9
810, 870, 930 Pulse, 18 Hz, 50% DC 28
1720, 1845, 1970 Pulse, 217 Hz, 50% DC 28
2450 28
5240, 5500, 5785 9

ENGLISH 18 WWW.MAXTEC.COM • [phone]
This page intentionally left blank

WWW.MAXTEC.COM • [phone] 19 ENGLISH
This page intentionally left blank

2305 South 1070 West
Salt Lake City, Utah 84119
[phone]
www.maxtec.com