Maxtec MaxO2 Plus User manual

MaxO2+
Instructions for Use
ENGLISH
R217M40 REV. U

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This manual describes the function, operation and maintenance of the Maxtec Model MaxO2+ A
and AE oxygen analyzer. The MaxO2+ family of Oxygen Analyzers utilizes the Maxtec Max-250
oxygen sensor and is engineered for fast response, maximum reliability and stable perfor-
mance. The MaxO2+ is designed as a tool for use by qualified personnel to spot-check or mea-
sure oxygen concentration of delivered air/oxygen mixtures. The MaxO2+ A and AE Analyzers
are not intended for use in continuous monitoring of oxygen delivery to a patient.
Product Disposal Instructions:
The sensor, batteries, and circuit board are not suitable for regular trash dis-
posal. Return sensor to Maxtec for proper disposal or dispose according to local
guidelines. Follow local guidelines for disposal of other components.
CLASSIFICATION
Protection against electric shock..........................................................................................II, Type B
Protection against water................................................................................................................IPX1
Mode of operation..............................................................................................................Continuous
Sterilization...................................................................................................................See section 7.0
Flammable anesthetic mixture .....................................................Not suitable for use in presence
of a flammable anesthetic mixture
WARRANTY
The MaxO2+ Analyzer is designed for medical oxygen delivery equipment and systems. Under
normal operating conditions, Maxtec warrants the MaxO2+ Analyzer to be free from defects of
workmanship or materials for a period of 2-years from the date of shipment from Maxtec, pro-
vided that the unit is properly operated and maintained in accordance with Maxtec’s operating
instructions. Based on Maxtec product evaluation, Maxtec’s sole obligation under the forego-
ing warranty is limited to making replacements, repairs, or issuing credit for equipment found
to be defective. This warranty extends only to the buyer purchasing the equipment directly
from Maxtec or through Maxtec 's designated distributors and agents as new equipment.
Maxtec warrants Max-250 oxygen sensor in the MaxO2+ Analyzer to be free from defects in
material and workmanship for a period of 2-years from Maxtec’s date of shipment in a MaxO2+
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 con-
sequential damages or equipment that has been subject to abuse, misuse, mis-application,
alteration, negligence or accident.
These warranties are exclusive and in lieu of all other warranties, expressed or implied, includ-
ing warranty of merchantability and fitness for a particular purpose.
WARNINGS
Indicates a potentially hazardous situation, if not avoided, could result in death or serious
injury.
◆ Never install the sensor in a location that will expose the sensor to patient’s exhaled breath
or secretions, unless you intend to dispose of the sensor, flow diverter and tee adapter.
◆ Improper use of this device can cause inaccurate oxygen readings which can lead to
improper treatment, hypoxia or hyperoxia. Follow the procedures outlined in this user
manual.
◆ Not for use in an MRI environment.
◆ Device specified for dry gas only.
◆ Never allow an excess length of tubing, lanyard or sensor cable near the patient’s head or
neck, which may result in strangulation.
◆ Before use, all individuals who will be using the MaxO2+ must become thoroughly familiar
with the information contained in this Operation Manual. Strict adherence to the operating
instructions is necessary for safe, effective product performance.
◆ This product will perform only as designed if installed and operated in accordance with the
manufacturer’s operating instructions.
◆ Use only genuine Maxtec accessories and replacement parts. Failure to do so may seriously
impair the analyzer’s performance. Repair of this equipment must be performed by a qual-
ified service technician experienced in repair of portable hand held medical equipment.
◆ Calibrate the MaxO2+ weekly when in operation, or if environmental conditions change
significantly. (i.e., Elevation, Temperature, Pressure, Humidity — refer to Section 3.0 of this
manual).
◆ Use of the MaxO2+ near devices that generate electrical fields may cause erratic readings.
◆ If the MaxO2+ is ever exposed to liquids (from spills or immersion) or to any other physical
abuse, turn the instrument OFF and then ON. This will allow the unit to go through its self
test to assure everything is operating correctly.
◆ Never autoclave, immerse or expose the MaxO2+ (including sensor) to high temperatures
(>70°C). Never expose the device to pressure, irradiation vacuum, steam, or chemicals.
◆ This device does not contain automatic barometric pressure compensation.
◆ Although the sensor of this device has been tested with various anesthesia gases including
nitrous oxide, Halothane, Isoflurane, Enflurane, Sevoflurane and Desflurane and found to
have acceptably low interference, the device in entirety (including electronics) is not suit-
able for use in the presence of a flammable anesthetic mixture with air or with oxygen or
nitrous oxide. Only the threaded sensor face, flow diverter, and “T” adapter may be allowed
to contact such a gas mixture.
◆ Not for use with inhalation agents. Operating the device in flammable or explosive atmo-
spheres may result in fire or explosion.
◆ This product is not intended as a life-sustaining or life-supporting device.
◆ Medical oxygen should meet the requirements of USP.
◆ The MaxO2+ and sensor are non-sterile devices.
◆ In the event of exposure to an ELECTROMAGNETIC DISTURBANCE the analyzer may display an
E06 or E02 error message. If this occurs, turn the instrument OFF, remove the batteries and
wait 30 seconds. Then, re-load the batteries and allow the unit to go through its self-test
diagnostics to make sure everything is functioning correctly.
CAUTIONS
Indicates a potentially hazardous situation, if not avoided, could result in minor or moderate
injury and property damage.
◆ Federal Law (USA) restricts this device to sale by or on the order of a physician.
◆ Replace the batteries with recognized high quality AA Alkaline or Lithium batteries.
DO NOT use rechargeable batteries.
◆ If the unit is going to be stored (not in use for 1 month), we recommend that you remove
the batteries to protect the unit from potential battery leakage.
NOTE: The latest edition of this operating manual can be downloaded from our website at www.maxtec.com
Conforms to:
AAMI STD ES60601-1, ISO STD
80601-2-55, IEC STDS 60601-
1-6, 60601-1-8 & 62366
Certified to:
CSA STD C22.2 No. 60601-1
Maxtec
2305 South 1070 West
Salt Lake City, Utah 84119
USA
phone: [phone]
fax: [phone]
email: [e-mail]
web: www.maxtec.com

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◆ The Maxtec Max-250 oxygen sensor is a sealed device containing a mild acid electrolyte,
lead (Pb), and lead acetate. Lead and lead acetate are hazardous waste constituents and
should be disposed of properly, or returned to Maxtec for proper disposal or recovery.
DO NOT use ethylene oxide sterilization.
DO NOT immerse the sensor in any cleaning solution, autoclave or expose the sensor to
high temperatures.
◆ Dropping sensor can adversely affect its performance.
◆ The device will assume a percent oxygen concentration when calibrating. Be sure to apply
100% oxygen, or ambient air concentration to the device during calibration or the device
will not calibrate correctly.
NOTE: This product is latex free.
SYMBOL GUIDE
The following symbols and safety labels are found on the MaxO2+:
Follow instructions for use On/O Button
Warning Calibration Button
Meets ETL standards
Do not throw away.
Follow local guidelines
for disposal
DO NOT %Percent
Low Battery Serial Number
Calibration Required Lot code/Batch code
Caution Ingress Protection
Rating
Federal law (USA) restricts
this device to sale by or
on order of a physician
Authorized
Representative
in the European
Community
Manufacturer Catalog Number
Date of Manufacture Medical Device
1.0 OVERVIEW
1.1 Indications for Use
The MaxO2+ oxygen analyzer is intended for spot checking of the concentration of oxygen
being delivered to patients ranging from newborns to adults. It can be used in pre-hospital,
hospital, and sub-acute settings. The MaxO2+ is not a life supporting device.
1.2 Base Unit Description
The MaxO2+ analyzer provides unparalleled performance and reliability due to an advanced
design that includes the following features and operational benefits.
•Extra-life oxygen sensor of approximately 1,500,000 O2 percent hours (2-year
warranty)
•Durable, compact design that permits comfortable, hand-held operation and easy to
clean
•Operation using only two AA Alkaline batteries (2 x 1.5 Volts) for approximately 5000
hours of performance with continuous use. For extra extended long life, two AA
Lithium batteries may be used.
•Oxygen-specific, galvanic sensor that achieves 90% of final value in approximately 15
seconds at room temperature.
•Large, easy-to-read, 3 1/2-digit LCD display for readings in the 0-100% range.
•Simple operation and easy one-key calibration.
•Self-diagnostic check of analog and microprocessor circuitry.
•Low battery indication.
•Calibration reminder timer that alerts the operator, using a calibration icon on the LCD
display, to perform a unit calibration.
1.3 Component Identification
1
2
3
4
5
6
7
1
3-DIGIT LCD DISPLAY — The 3 digit liquid crystal display (LCD) provides direct readout of
oxygen concentrations in the range of 0 – 105.0% (100.1% to 105.0% used for calibration
determination purposes). The digits also display error codes and calibration codes as
necessary.
2
LOW BATTERY INDICATOR — The low battery indicator is located at the top of the display
and is only activated when the voltage on the batteries is below a normal operating
level.
3
“%” SYMBOL — The “%” sign is located to the right of the concentration number and is
present during normal operation.
4
CALIBRATION SYMBOL — The calibration symbol is located at the bottom of the
display and is timed to activate when a calibration is necessary.
5
ON/OFF KEY — This key is used to turn the device on or off.
6
CALIBRATION KEY — This key is used to calibrate the device. Holding the key for
more than three seconds will force the device to enter a calibration mode.
7
SAMPLE INLET CONNECTION — This is the port at which the device is connected to deter-
mine oxygen concentration.
1.4 Max-250 Oxygen Sensor
The Max-250+ oxygen sensor offers stability and extra life. The Max-250+ 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 at a gold cathode. Concurrently, oxidation occurs electrochemically at
the 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 sensors
long life and motion insensitive characteristic. Since the sensor is specific to oxygen, the cur-
rent 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.

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2.0 OPERATING INSTRUCTIONS
2.1 Getting Started
2.1.1 Protect Tape
Prior to turning on the unit, a protective film covering the threaded sensor face must be
removed. After removing the film, wait approximately 20 minutes for the sensor to reach
equilibrium.
2.1.2 Automatic Calibration
After the unit is turned on it will automatically calibrate to room air. The display should be
stable and reading 20.9%.
CAUTION: The device will assume a percent oxygen concentration when calibrating. Be
sure to apply 100% oxygen, or ambient air concentration to the device during calibration or the
device will not calibrate correctly.
To check the oxygen concentration of a sample gas: (after the unit has been calibrated):
FIGURE 1
A B
1. Connect the Tygon tubing to the bottom of the analyzer by threading the barbed
adapter onto the oxygen sensor. (FIGURE 1, B)
2. Attach the other end of the sample hose to the sample gas source and initiate flow
of the sample to the unit at a rate of 1-10 liters per minute (2 liters per minute is
recommended).
3. Using the “ON/OFF” key, make sure the unit is in the power “ON” mode.
4. Allow the oxygen reading to stabilize. This will normally take about 30 seconds or more.
2.2 Calibrating the MaxO2+ Oxygen Analyzer
NOTE: We recommend use of medical grade USP or >99% purity oxygen when calibrating the
MaxO2+.
The MaxO2+ Analyzer should be calibrated upon initial power-up. Thereafter, Maxtec recom-
mends calibration on a weekly basis. To serve as a reminder, a one week timer is started with
each new calibration. At the end of one week a reminder icon “ ” will appear on the
bottom of the LCD. Calibration is recommended if the user is unsure when the last calibration
procedure was performed, or if the measurement value is in question. Start calibration by
pressing the Calibration key for more than 3 seconds. The MaxO2+ will automatically
detect if you are calibrating with 100% oxygen or 20.9% oxygen (normal air).
DO NOT attempt to calibrate to any other concentration.
For hospital and home care a new calibration is
required when:
•The measured O2 percentage in 100% O2 is below 97.0% O2.
•The measured O2 percentage in 100% O2 is above 103.0% O2.
•The CAL reminder Icon is blinking at the bottom of the LCD.
•If you are unsure about the displayed O2 percentage. (see Factors influencing accurate
readings.)
For ID testing, (or optimum accuracy) a new calibra-
tion is required when:
•The measured O2 percentage in 100% O2 is below 99.0% O2.
•The measured O2 percentage in 100% O2 is above 101.0% O2.
•The CAL reminder Icon is blinking at the bottom of the LCD.
•If you are unsure about the displayed O2 percentage (see Factors influencing accurate
readings).
A simple calibration may be made with the sensor open to static ambient air. For optimum
accuracy Maxtec recommends that the Sensor be placed in a closed loop circuit where gas flow
is moving across the sensor in a controlled manner. Calibrate with the same type of circuit and
flow that you will use in taking your readings.
2.2.1 In Line Calibration (Flow Diverter –
Tee Adapter)
1. Attach the diverter to the MaxO2+ by threading it on to the bottom of the sensor.
2. Insert the MaxO2+ in the center position of the tee adapter. (FIGURE 1, A)
3. Attach an open-ended reservoir to the end of the tee adapter. Then start the
calibration flow of oxygen at two liters per minute.
•Six to 10 inches of corrugated tubing works well as a reservoir. A calibration oxygen
flow to the MaxO2+ of two liters per minute is recommended to minimize the
possibility of obtaining a “false” calibration value.
4. Allow the oxygen to saturate the sensor. Although a stable value is usually observed
within 30 seconds, allow at least two minutes to ensure that the sensor is completely
saturated with the calibration gas.
5. If the MaxO2+ is not already turned on, do so now by pressing the analyzer “ON”
button.
6. Press the Cal button on the MaxO2+ until you read the word CAL on the analyzer
display. This can take approximately 3 seconds. The analyzer will now look for a
stable sensor signal and a good reading. When obtained, the analyzer will display the
calibration gas on the LCD.
NOTE: Analyzer will read “Cal Err St” if the sample gas has not stabilized.
2.2.2 Direct Flow Calibration (Barb)
1. Attach the Barbed Adapter to the MaxO2+ by threading it on to the bottom of the
sensor.
2. Connect the Tygon tube to the barbed adapter. (FIGURE 1, B)
3. Attach the other end of the clear sampling tube to a source of oxygen with a known
oxygen concentration value. Initiate flow of the calibration gas to the unit. Two liters
per minute is recommended.
4. Allow the oxygen to saturate the sensor. Although a stable value is usually observed
within 30 seconds, allow at least two minutes to ensure that the sensor is completely
saturated with the calibration gas.
5. If the MaxO2+ is not already turned on, do so now by pressing the analyzer “ON”
button.
6. Press the Cal button on the MaxO2+ until you read the word CAL on the analyzer
display. This can take approximately 3 seconds. The analyzer will now look for a
stable sensor signal and a good reading. When obtained, the analyzer will display the
calibration gas on the LCD.
3.0 FACTORS INFLUENCING
ACCURATE READINGS
3.1 Elevation/Pressure Changes
•Changes in elevation result in a reading error of approximately 1% of reading per 250
feet.
•In general, calibration of the instrument should be performed when elevation at which
the product is being used changes by more than 500 feet.
•This device does not automatically compensate for changes in barometric pressure
or altitude. If the device is moved to a location of a different altitude, it must be
recalibrated before use.

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3.2 Temperature Effects
The MaxO2+ will hold calibration and read correctly within ±3% when at thermal equilibrium
within the operating temperature range. The device must be thermally stable when calibrated
and allowed to thermally stabilize after experiencing temperature changes before readings
are accurate. For these reasons, the following is recommended:
•For best results, perform the calibration procedure at a temperature close to the
temperature where analysis will occur.
•Allow adequate time for the sensor to equilibrate to a new ambient temperature.
CAUTION: “CAL Err St” may result from a sensor that has not reached thermal equilibrium.
When used in a breathing circuit, place the sensor upstream of the heater.
3.3 Pressure Effects
Readings from the MaxO2+ are proportional to the partial pressure of oxygen. The partial pres-
sure is equal to the concentration times the absolute pressure.
Thus, the readings are proportional to the concentration if the pressure is held constant.
Therefore, the following are recommended:
•Calibrate the MaxO2+ at the same pressure as the sample gas.
•If sample gases flow through tubing, use the same apparatus and flow rates when
calibrating as when measuring.
3.4 Humidity Effects
Humidity (non-condensing) has no effect on the performance of the MaxO2+ other than dilut-
ing the gas, as long as there is no condensation. Depending on the humidity, the gas may be
diluted by as much as 4%, which proportionally reduces the oxygen concentration. The device
responds to the actual oxygen concentration rather than the dry concentration. Environments
where condensation may occur are to be avoided since moisture may obstruct passage of
gas to the sensing surface, resulting in erroneous readings and slower response time. For this
reason, the following is recommended:
•Avoid usage in environments greater than 95% relative humidity.
•When used in a breathing circuit, place the sensor upstream of the humidifier.
HELPFUL HINT: Dry sensor by lightly shaking moisture out, or flow a dry gas at two liters per
minute across the sensor membrane.
4.0 CALIBRATION ERRORS AND
ERROR CODES
The MaxO2+ analyzers have a self test feature built into the software to detect faulty calibra-
tions, oxygen sensor failures, and low operating voltage. These are listed below, and include
possible actions to take, if an error code occurs.
E02: No sensor attached
•MaxO2+A: Open unit and disconnect and reconnect sensor. Unit should perform an auto
calibration and should read 20.9%. If not, contact Maxtec Customer Service for possible
sensor replacement.
•MaxO2+AE: Disconnect and reconnect external sensor. Unit should perform an auto
calibration, and should read 20.9%. If not, contact Maxtec Customer Service for possible
sensor replacement or cable replacement.
E03: No valid calibration data available
•Make sure unit has reached thermal equilibrium. Press and hold the Calibration Button
for three seconds to manually force a new calibration.
E04: Battery below minimum operating voltage
•Replace batteries.
E06: Non-compatible oxygen sensor, see note below.
•Replace batteries.
CAL ERR ST: O2 Sensor reading not stable
•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).
CAL ERR LO: Sensor voltage too low
•Press and hold the Calibration Button for three seconds to manually force a new
calibration. If unit repeats this error more than three times, contact Maxtec Customer
Service for possible sensor replacement.
CAL ERR HI: Sensor voltage too high
•Press and hold the Calibration Button for three seconds to manually force a new
calibration. If unit repeats this error more than three times, contact Maxtec Customer
Service for possible sensor replacement.
CAL ERR BAT: Battery voltage too low to recalibrate
•Replace batteries.
NOTE: If you receive a E01, E05, or an E07 error code, correct by ensuring the calibration gas is
either room air or 100% oxygen. Also ensure the calibration gas flow, pressure and concentra-
tion is constant. Allow sufficient time for the sensor to stabilize in the calibration gas and with
room temperature, then attempt to calibrate again.
If these steps do not correct the error, contact Maxtec for technical support.
NOTE: Use only a Maxtec approved Max-550E sensor called out in Section 9.0 of the Spare Parts
List. The Max550E sensor is equipped with an authentication chip to ensure the monitor is used
with an approved sensor.
NOTE: Correcting E02, E06, or E07 errors:
1. Disconnect the sensor and reconnect, making sure the male plug is fully inserted into
the receptacle before tightening the threaded locking shroud. The analyzer should now
perform a new calibration with the error cleared.
2. 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.
3. Contact Maxtec Customer Service Department if the error code cannot be cleared.
5.0 CHANGING THE BATTERIES
Batteries should be changed by service personnel.
•Use only brand name batteries.
•Replace with two AA batteries and insert per orientation marked on the device.
Should the batteries require changing, the device will indicate this in one of two ways:
•The battery icon on the bottom of the display will begin to flash. This icon will continue
to flash until the batteries are changed. The unit will continue to function normally for
approx. 200 hours.
•If the device detects a very low battery level, an error code of “E04” will be present on
the display, and the unit will not function until the batteries are changed.
To change the batteries, begin by removing the
three screws from the back of the device.
A #1 Phillips screwdriver is required to
remove these screws.
Once the screws are removed,
gently separate the two halves
of the device.
The batteries can now be replaced from
the back half of the case. Be sure to orient the new
batteries as indicated in the embossed polarity on
the back case.
NOTE: If the batteries are installed incorrectly the
batteries will not make contact and the device will
not operate.
FIGURE 2

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Carefully, bring the two halves of the case together while positioning the wires so they are not
pinched between the two case halves.
The gasket separating the halves will be captured on the back case half.
Reinsert the three screws and tighten until the screws are snug. (FIGURE 2).
The device will automatically perform a calibration and begin displaying % of oxygen.
HELPFUL HINT: If unit does not function, verify that the screws are tight to allow proper electri-
cal connection.
HELPFUL HINT (MAXO2+ AE): Before closing the two case halves together, verify that the keyed
slot on top of the coiled cable assembly is engaged on the small tab located on the back case.
This is designed to position the assembly in the correct orientation and prevent it from rotat-
ing. Improper positioning could hinder the case halves from closing and prevent operation
when tightening the screws.
6.0 CHANGING THE OXYGEN SENSOR
6.1 MaxO2+A Model
Should the oxygen sensor require changing, the device will indicate this by presenting “Cal Err
lo” on the display after initiating a calibration.
To change the oxygen sensor, begin by removing the three screws from the back of the device.
LOCK LEVER
FIGURE 3
A #1 Phillips screwdriver is required to remove these screws.
Once the screws are removed, gently separate the two halves of the device.
Disconnect the oxygen sensor from the printed circuit board by pressing the unlock lever first
and then pulling the connector out of the receptacle. The oxygen sensor can now be replaced
from the back half of the case.
HELPFUL HINT: Be sure to orient the new sensor by aligning the red arrow on the sensor with
the arrow in the back case. A small tab is located on the back case that is designed to engage
the sensor and prevent it from rotating within the case. (FIGURE 3)
NOTE: If the oxygen sensor is installed incorrectly, the case will not come back together and
the unit may be damaged when the screws are reinstalled.
NOTE: If the new sensor has red tape over the outside, remove it, then wait 30 minutes before
calibrating.
Reconnect the oxygen sensor to the connector on the printed circuit board. Carefully bring
the two halves of the case together while positioning the wires to ensure they are not
pinched between the two case halves. Make sure the sensor is fully inserted and in the proper
orientation.
Reinsert the three screws and tighten until the screws are snug. Verify the unit operates prop-
erly. The device will automatically perform a calibration and begin displaying % of oxygen.
6.2 MaxO2+AE Model
Should the oxygen sensor require changing, the device will indicate this by presenting “Cal
Err lo” on the display.
Unthread the sensor from the cable by rotating the thumbscrew connector counterclockwise and
pull the sensor from the connection. Replace the new sensor by inserting the electrical plug from
the coiled cord into the receptacle on the oxygen sensor. Rotate the thumbscrew clockwise until
snug. The device will automatically perform a calibration and begin displaying % of oxygen.
7.0 CLEANING AND MAINTENANCE
Store the MaxO2+ analyzer in a temperature similar to its ambient environment of daily use.
The instruction given below describes the methods to clean and disinfect the instrument, sen-
sor and its accessories (e.g. flow diverter, tee adapter):
Instrument Cleaning:
◆ When cleaning or disinfecting the exterior of the MaxO2+ analyzer, take appropriate care to
prevent any solution from entering the instrument.
DO NOT immerse unit in fluids.
◆ The MaxO2+ analyzer surface may be cleaned using a mild detergent and a moist cloth.
◆ The MaxO2+ analyzer is not intended for steam, ethylene oxide or radiation sterilization.
Oxygen Sensor:
WARNING: Never install the sensor in a location that will expose the sensor to patient’s
exhaled breath or secretions, unless you intend to dispose of the sensor, flow diverter and tee
adapter after use.
◆ Clean the sensor with a cloth moistened with isopropyl alcohol (65% alcohol/water
solution).
◆ Maxtec does not recommend use of spray disinfectants because they can contain salts,
which can accumulate in the sensor membrane and impair readings.
◆ The oxygen sensor is not intended for steam, ethylene oxide or radiation sterilization.
Accessories:
STERILIZING: The flow diverter and tee adapter Maxtec recommends that operators carefully
examine the flow diverter and tee adapter after sterilization and prior to use to verify that the
item is fit for use. The operator should verify that there are no cracks and the item does not show
any indiction of material changes or physical damage that may compromise its effective use.
Because of the variability of the cleaning, disinfecting and sterilizing processes, Maxtec cannot
provide specific sterilization instructions, nor can the sterility of the item be ensured. If the
accessory is suspected to be contaminated it should be removed and discarded.
8.0 SPECIFICATIONS
8.1 Base Unit Specifications
Measurement Range.................................................................................................................0-100%
Resolution.......................................................................................................................................0.1%
Accuracy and Linearity .....................................1% of full scale at constant temperature, R.H. and
pressure when calibrated at full scale
Total Accuracy........................................±3% actual oxygen level over full operating temp range
Response Time ........................................90% of final value in approximately 15 seconds at 23˚C
Warm-up Time..............................................................................................................None required
Operating Temperature............................................................................15˚C - 40˚C (59˚F - 104˚F)
Storage Temperature.................................................................................-15˚C - 50˚C (5˚F - 122˚F)
Atmospheric Pressure................................................................................................ 800-1013 mBars
Humidity .....................................................................................................0-95% (non-condensing)
Power Requirements.............................................................2, AA Alkaline batteries (2 x 1.5 Volts)
Battery Life............................................................approximately 5000 hours with continuous use
Low Battery Indication .........................................................................."BAT" icon displayed on LCD
Sensor Type........................................................................Maxtec Max-250 series galvanic fuel cell
Expected Sensor Life........................................................ > 1,500,000 O2 percent hours minimum
(2-year in typical medical applications)

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Drift of Measurement.......< +/-1% of full scale at constant temperature, pressure and humidity
A Model Dimensions.................................. 3.0”(W) x 4.0”(H) x 1.5”(D) [76mm x 102mm x 38mm]
A Weight......................................................................................................................... 0.4 lbs. (170g)
AE Model Dimensions.............................3.0”(W) x 36.0”(H) x 1.5”(D) [76mm x 914mm x38mm] ]
Height includes external cable length (retracted)
AE Weight.......................................................................................................................0.6 lbs. (285g)
8.2 Sensor Specifications
Type .....................................................................................................Galvanic fuel sensor (0-100%)
Life .......................................................................................................2-years in typical applications
9.0 MAXO2+ SPARE PARTS AND
ACCESSORIES
9.1 Included With Your Unit
PART NUMBER ITEM A MODEL AE MODEL
R217M40 User’s Guide and Operating Instructions x x
RP76P06 Lanyard x x
R110P10-001 Flow Diverter x x
RP16P02 Blue Tee Adapter x x
R217P23 Dovetail Bracket x
9.2 Standard Replacement Parts and
Accessories
PART NUMBER ITEM A MODEL AE MODEL
R125P02-011 Max-250+ Oxygen Sensor x
R125P03-002 Max-250E Oxygen Sensor x
R115P85 Max-250ESF Oxygen Sensor x
R217P08 Gasket x x
RP06P25 #4-40 Pan Head Stainless Steel Screw x x
R217P16-001 Front Assembly (Includes Board & LCD) x x
R217P11-002 Back Assembly x x
R217P24 Coiled Cable Assembly x
R217P09-001 Overlay x x
9.3 Optional Accessories
9.3.1 Optional Adapters
PART NUMBER ITEM
RP16P02 Blue Tee Adapter
R103P90 Perfusion Tee Adapter
RP16P05 Pediatric Tee Adapter
R207P17 Threaded Adapter with Tygon Tubing
9.3.2 Mounting Options (requires dovetail
R217P23)
PART NUMBER ITEM
R206P75 Pole Mount
R205P86 Wall Mount
R100P10 Rail Mount
R206P76 Horizontal Pole Mount
NOTE: Repair of this equipment must be performed by a qualified service technician experi-
enced in repair of portable hand held medical equipment.
Equipment in need of repair shall be sent to:
Maxtec
Service Department
2305 South 1070 West
Salt Lake City, Ut 84119
(Include RMA number issued by customer service)
10.0 ELECTROMAGNETIC
COMPATIBILITY
The information contained in this section (such as separation distances) is in general spe-
cifically written with regard to the MaxO2+ A/AE. The numbers provided will not guarantee
faultless operation but should provide reasonable assurance of such. This information may
not be applicable to other medical electrical equipment; older equipment may be particularly
susceptible to interference.
Note: Medical electrical equipment requires special precautions regarding electromagnetic
compatibility (EMC) and needs to be installed and put into service according to the EMC infor-
mation provided in this document and the remainder of the instructions for use this device.
Portable and mobile RF communications equipment can affect medical electrical equipment.
Cables and accessories not specified within the instructions for use are not authorized. Using
other cables and/or accessories may adversely impact safety, performance and electromag-
netic compatibility (increased emission and decreased immunity).
Care should be taken if the equipment is used adjacent to or stacked with other equipment;
if adjacent or stacked use is inevitable, the equipment should be observed to verify normal
operation in the configuration in which it will be used.
ELECTROMAGNETIC EMISSIONS
This equipment is intended for use in the electromagnetic environment specified below.
The user of this equipment should assure that it is used in such an environment.
EMISSIONS COMPLIANCE
ACCORDING TO ELECTROMAGNETIC ENVIRONMENT
RF Emissions
(CISPR 11)
Group 1 The MaxO2+ 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.
CISPR Emissions
Classification
Class A The MaxO2+ is suitable for use in all
establishments other than domestic and
those directly connected to the public low-
voltage power supply network that supplies
buildings used for domestic purposes.
NOTE: The EMISSIONS characteristics of this
equipment make it suitable for use in industrial
areas and hospitals (CISPR 11 class A). If it is used
in a residential environment (for which CISPR
11 class B is normally required) this equipment
might not oer adequate protection to radio-
frequency communication services. The user
might need to take mitigation measures, such
as relocating or re-orienting the equipment.
Harmonic Emissions
(IEC 61000-3-2)
Class A
Voltage Fluctuations Complies

ENGLISH 8WWW.MAXTEC.COM • [phone]
Recommended separation distances between portable and mobile
RF communications equipment and the equipment
RATED MAXIMUM
OUTPUT POWER OF
TRANSMITTER
W
Separation distance according to frequency
of transmitters in meters
150 kHz to 80 MHz
d=1.2/V1] √P
80 MHz to 800 MHz
d=1.2/V1] √P
800MHz to 2.5 GHz
d=2.3 √P
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
11.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
For transmitters rated at a maximum output power not listed above, the recommended
separation distance d in meters (m) can be estimated using the equation applicable
to the frequency of the transmitter, where P is the maximum output power rating
of the transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1: At 80 MHz and 800 MHz, the separation distance for the higher frequency range
applies.
NOTE 2: These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects, and people.
ELECTROMAGNETIC IMMUNITY
This equipment is intended for use in the electromagnetic environment specified below.
The user of this equipment should assure that it is used in such an environment.
IMMUNITY AGAINST IEC 60601-1-2: (4TH
EDITION) TEST LEVEL
ELECTROMAGNETIC
ENVIRONMENT
Professional
Healthcare
Facility
Environment
Home
Healthcare
Environment
Electrostatic discharge,
ESD (IEC 61000-4-2)
Contact discharge: ±8 kV
Air discharge: ±2 kV,
±4 kV, ±8 kV, ±15 kV
Floors should be wood,
concrete, or ceramic tile.
If floors are covered with
synthetic material, the relative
humidity should be kept at
levels to reduce electrostatic
charge to suitable levels.
Mains power quality should be
that of a typical commercial or
hospital environment.
Equipment which emits high
levels of power line magnetic
fields (in excess of 30A/m)
should be kept at a distance
to reduce the likelihood of
interference.
If user requires continued
operation during power
mains interruptions, ensure
that batteries are installed
and charged. Ensure that
battery life exceeds longest
anticipated power outages
or provide an additional
uninterruptible power source.
Electrical fast
transients / bursts
(IEC 61000-4-4)
Power supply lines: ±2 kV
Longer input / output
lines: ±1 kV
Surges on AC mains
lines (IEC 61000-4-5)
Common mode: ±2 kV
Dierential mode: ±1 kV
3 A/m power
frequency magnetic
field 50/60 Hz
(IEC 61000-4-8)
30 A/m
50 Hz or 60 Hz
Voltage dips and
short interruptions
on AC mains input
lines (IEC 61000-4-11)
Dip>95%, 0.5 periods
Dip 60%, 5 periods
Dip 30%, 25 periods
Dip >95%, 5 seconds
This equipment is intended for use in the electromagnetic environment
specified below. The customer or the user of this equipment
should assure that it is used in such an environment.
IMMUNITY TEST IEC 60601-1-2: 2014 (4TH
EDITION) TEST LEVEL
ELECTROMAGNETIC
ENVIRONMENT - GUIDANCE
Professional
Healthcare Facility
Environment
Home
Healthcare
Environment
Conducted RF
coupled into lines
(IEC 61000-4-6)
3V (0.15 - 80 MHz)
6V (ISM bands)
3V (0.15 - 80 MHz)
6V (ISM &
Amateur bands)
Portable and mobile RF communications
equipment (including cables) should
be used no closer to any part of the
equipment than the recommended
separation distance calculated from the
equation applicable to the frequency of
the transmitter as below.
Recommended separation distance:
d=1.2 √P
d=1.2 √P 80 MHz to 800 MHz
d=2.3 √P 800 MHz to 2.7 GHz
Where P is the maximum output
power rating of the transmitter in
watts (W) according to the transmitter
manufacturer and d is the recommended
separation distance in metres (m).
Field strengths from fixed RF
transmitters, as determined by
an electromagnetic site survey a,
should be less than the compliance
level in each frequency range b.
Interference may occur in the
vicinity of equipment marked
with the following symbol:
Radiated RF
immunity (IEC
61000-4-3)
3 V/m
80 MHz - 2.7 GHz
80% @ 1 KHz
AM Modulation
10 V/m
80 MHz - 2.7 GHz
80% @ 1 KHz
AM Modulation
The ISM (industrial, scientific and medical) bands between 150 kHz and 80 MHz are 6,765 MHz
to 6,795 MHz; 13,553 MHz to 13,567 MHz; 26,957 MHz to 27,283 MHz; and 40,66 MHz to 40,70 MHz.
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) tele-
phones and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast
cannot be predicted theoretically with accuracy. To assess the electromagnetic environment
due to fixed RF transmitters, an electromagnetic site survey should be considered. If the mea-
sured field strength in the location in which the equipment is used exceeds the applicable
RF compliance level above, the equipment should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as reorient-
ing or relocating the equipment.

9
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2305 South 1070 West
Salt Lake City, Utah 84119
[phone]
www.maxtec.com