Maxtec MaxVenturi User manual

MaxVenturi®
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Instructions for Use
ENGLISH
R211M03 REV. U

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CLASSIFICATION
Protection against electric shock.................................................... internally powered equipment
Protection against water................................................................................................................IPX1
Mode of operation..............................................................................................................Continuous
Flammable anesthetic mixture ..............................................Not suitable for use in the presence
of a flammable anesthetic mixture
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.
WARRANTY
Provided the device is properly maintained and under normal operating conditions, Maxtec
warrants the MaxVenturi to be free from defects of workmanship or materials for a period of 2
years from the date of shipment from Maxtec. Based on Maxtec’s product evaluation, Maxtec’s
sole obligation under the foregoing 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 the MAX-250E oxygen sensor in the MaxVenturi to be free from defects
in material and workmanship for a period of 2 years from Maxtec’s date of shipment in a
MaxVenturi 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 conse-
quential damages or for 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.
WARNINGS
Indicates a potentially hazardous situation, if not avoided, could result in death or serious
injury.
◆ This device is not intended for use with life supporting devices/systems.
◆ Failure to comply with the warnings and precautions in this manual could result in instru-
ment damage and possibly jeopardize the wellbeing of the patient and/or health care
professional. Improper use of this device can cause inaccuracy of flow and oxygen read-
ings which can lead to improper treatment, hypoxia or hyperoxia, or other patient injury or
discomfort. Follow the procedures outlined in this user manual.
◆ Not for use in an MRI environment.
◆ If the O2% drifts away from the level to which it was set, check to make sure the nasal prongs
on the patient interface are not occluded by sputum or the nasal septum. Flow restriction
to the circuit or patient interface will cause the oxygen level to increase. Flow restriction
downstream of the venturi unit will not be detected by the flow meter.
◆ This device does not have any alarms for interruption in oxygen supply.
◆ Allow oxygen reading to stabilize before adjusting oxygen content.
◆ This device does not have any alarms for oxygen level high or low alarms.
◆ Never allow excess length of tubing near the patient’s head or neck which could result in
strangulation.
◆ Use only Maxtec replacement sensors. Use of any other sensor will void warranty and may
lead to product damage, product malfunction, improper treatment to patient, hypoxia, or
hyperoxia.
DO NOT use this device near any type of flame or flammable/explosive substances,
vapors or atmosphere. Operating the oxygen analyzer in these environments may result
in fire or explosion.
◆ This device in its entirety (including electronics) is not suitable for use in the presence of
flammable anaesthetic mixtures or in an atmosphere of explosive gases. Operating the oxy-
gen analyzer in these environments may result in fire or explosion.
DO NOT attach a humidifier or any other source gas to the room air inlet. It should be
occupied at all times by the filter listed in the disposables list. The inlet filter prevents
entrainment of ambient contamination and silences venturi noise. The filter provided
with the MaxVenturi is single-patient use only.
◆ Use of this device with a pressurized oxygen bottle may result in inaccurate oxygen con-
centration readings when used above 40 LPM and at high oxygen concentrations. High tank
pressures result in cooling oxygen supply temperatures which affect the accuracy of the
oxygen sensor. It is suggested that the device be connected with a long supply hose. Use a 15
ft supply hose where possible — Maxtec P/N (R127P35).
◆ Use patient circuits that are approved for use with the manufacturer’s humidifier as listed in
their individual instructions for use.
DO NOT attempt to clean the inside of the flow meter. If any malfunction is detected in the
function of the flow meter, if any debris or contamination is detected in the flow meter, or
if the float sticks in the flow tube, discontinue use immediately and return the device to
Maxtec for service.
◆ Never install the sensor in any location other than the sensor port in the device.
SENSOR WARNINGS: 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 con-
stituents and should be disposed of properly, or returned to Maxtec for proper disposal or
recovery.
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
NOTE: The latest edition of this operating manual can be downloaded from our website at www.maxtec.com
Maxtec
2305 South 1070 West
Salt Lake City, Utah 84119
USA
phone: [phone]
fax: [phone]
email: [e-mail]
web: www.maxtec.com
EN Instructions for Use

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DO NOT use ethylene oxide sterilization.
DO NOT immerse the sensor in any cleaning solution, autoclave or expose the sensor to
high temperatures.
◆ Dropping or severely jarring the sensor after calibration may shift the calibration point
enough to require recalibration.
CAUTIONS
Indicates a potentially hazardous situation, if not avoided, could result in minor or moderate
injury and property damage.
◆ Never install the sensor in a location that will expose the sensor to patient exhalation or
secretions.
◆ Only use Maxtec approved accessories and replacement parts. Failure to do so may seriously
impair the MaxVenturi’s performance. Repair or alteration of the MaxVenturi beyond the
scope of the maintenance instructions or by anyone other than authorized Maxtec service
personnel could cause the product to fail to perform as designed.
◆ Use of the MaxVenturi near devices that generate strong electrical fields may cause erratic
readings. In the event of exposure to an ELECTROMAGNETIC DISTURBANCE the analyzer may
display an E02 error message. If this occurs, refer to Section 4.0 for instructions to resolve
the problem.
◆ This device has a visual low-battery alarm but no audible alarm.
◆ Calibrate the MaxVenturi weekly when in operation or if environmental conditions change
significantly, i.e., Temperature, Humidity, Barometric Pressure. (refer to Calibration sections
of this manual).
◆ The device will assume a percent oxygen concentration when calibrating. Be sure to apply
100% oxygen or room air concentration to the device during calibration or the device will not
calibrate correctly. (See section 2.2)
DO NOT immerse the device in any cleaning solution, autoclave or expose the device to
high temperatures.
◆ Use with any other patient interface system may result in false readings from the flow meter.
◆ The MaxVenturi is not intended for steam, ethylene oxide or radiation sterilization.
DO NOT clean with ethanol or acetone.
◆ After cleaning, and before use on a patient, attach the device to an oxygen supply and allow
the device to run at high flow for several minutes to allow any cleaning fluids or vapors to
evaporate and be flushed out.
◆ The device can flow excess oxygen out the entrainment port if the oxygen control knob is
turned up too high. This can lead to a minor drop in total air flow to the patient and excess
oxygen entering the room environment.
◆ Federal Law (USA) restricts this device to sale by or on the order of a physician.
ATTENTION
Indicates a potentially hazardous situation, if not avoided, could result in minor or moderate
injury and property damage.
◆ If the MaxVenturi is ever exposed to liquids (spills or immersion) or to any other physical
abuse, return to Maxtec for evaluation before use.
◆ Always remove the batteries to protect the unit from potential leaky battery damage when
the unit is going to be stored or not in use for periods exceeding 1 month. Replace dead bat-
teries with high quality AA Alkaline batteries.
DO NOT use rechargeable batteries with this device.
◆ Maxtec cannot warranty any damage resulting from misuse, unauthorized repair or
improper maintenance of the instrument.
◆ This product is Latex free.
◆ Avoid usage in environments with greater than 95% relative humidity.

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TABLE OF CONTENTS
CLASSIFICATION ....................................................2
WARRANTY .............................................................2
WARNINGS ........................................................................... 2
CAUTIONS .........................................................3
ATTENTION ..............................................................3
1.0 SYSTEM OVERVIEW.........................................5
1.1 Indications for Use...............................................................................................5
1.2 Component Identification..................................................................................5
1.3 Symbol Guide......................................................................................................5
1.4 Product Primary Functions................................................................................5
2.0 SET-UP INSTRUCTIONS..................................6
2.1 Sensor Installation..............................................................................................6
2.2 Calibration ..........................................................................................................6
2.2.1 Room Air Calibration ............................................................................6
2.2.2 100% Oxygen Calibration ....................................................................6
2.3 Device Set-up .....................................................................................................6
2.4 Flow and Oxygen Settings Adjustment...........................................................7
2.4.1 Initial Settings.......................................................................................7
2.4.2 Changing Flow Settings....................................................................... 7
2.4.3 Changing Oxygen Settings..................................................................7
2.5 Disposables.........................................................................................................7
2.5.1 Disposable Patient Circuits...................................................................7
2.5.2 Disposable Patient Interfaces.............................................................7
3.0 FACTORS INFLUENCING ACCURATE
READINGS ................................................................8
3.1 Elevation/Pressure Changes .............................................................................8
3.2 Temperature Effects ..........................................................................................8
3.3 Humidity Effect ..................................................................................................8
4.0 CALIBRATION ERRORS AND ERROR
CODES.......................................................................8
5.0 CHANGING THE OXYGEN SENSOR ..............8
6.0 CHANGING THE BATTERIES..........................9
7.0 CLEANING AND MAINTENANCE...................9
7.1 Routine Maintenance .........................................................................................9
7.2 Device Cleaning..................................................................................................9
7.3 Oxygen Sensor Cleaning....................................................................................9
8.0 SPECIFICATIONS .............................................9
8.1 Analyzer Specifications......................................................................................9
8.2 Oxygen Diluter Specifications...........................................................................9
8.3 Oxygen Inlet Supply ..........................................................................................9
9.0 MAXVENTURI SPARE PARTS AND
ACCESSORIES........................................................10
9.1 Included With Your Unit..................................................................................10
9.2 Standard Replacement Parts & Accessories.................................................10
9.3 Other Replacement Parts and Repairs.......................................................... 10
9.4 Preventative Maintenance............................................................................. 10
10.0 TROUBLESHOOTING................................... 10
11.0 AIR-ENTRAINMENT DEVICES VS
BLENDERS..............................................................10
12.0 ELECTROMAGNETIC COMPATABILITY ....10

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1.0 SYSTEM OVERVIEW
1.1 Indications for Use
The MaxVenturi Series is intended for use in high-flow oxygen therapy applications where the
ability to deliver diluted oxygen is required. Oxygen being delivered from this device is for
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, sub-acute
institutions, homecare, and intra-hospital transport. THIS IS NOT INTENDED AS A LIFE SUP-
PORTING DEVICE.
1.2 Component Identification
1
FLOW METER
2
OXYGEN ON/OFF VALVE
3
INLET OXYGEN FITTING
4
OXYGEN % CONTROL KNOB
5
FLOW CONTROL KNOB
6
ROOM AIR INLET
7
ROOM AIR INLET FILTER
8
ON/OFF BUTTON
9
CALIBRATION BUTTON
q
MAX-250 SERIES OXYGEN SENSOR
w
LOW BATTERY INDICATOR
e
3.5-DIGIT DISPLAY
r
CALIBRATION NEEDED INDICATOR
t
PATIENT OUTLET
1.3 Symbol Guide
The following symbols and safety labels are found on the MaxVenturi:
Follow instructions for use On/O Button
Warning Calibration Button
Meets ETL standards
Do not throw away.
Follow local guidelines
for disposal
Low Battery %Percent
Adjustable Flow Manufacturer
Patient Outlet Date of Manufacture
Read Flow Meter
Float at Center Medical Device
DO NOT Serial Number
Federal law (USA) restricts
this device to sale by or
on order of a physician
Lot code/Batch code
Room Air Inlet Ingress Protection Rating
Calibration Required
Authorized
Representative in the
European Commuity
Caution Catalog Number
Liter Per Minute Flow
1.4 Product Primary Functions
The primary function of the MaxVenturi is to deliver a mixed gas of oxygen and air to either
a heated humidifier system or directly to a patient. One of the primary accessories to the
MaxVenturi is a Fisher & Paykel heated humidifier (MR850) and the Optiflow high flow patient
interface system and Comfort Flo® Circuits (2415 & 2416) with the Hudson RCI® Neptune® Heated
Humidifier (425-00). Several other patient interface circuits listed in section 2.5 can also be
used with the MaxVenturi.
The MaxVenturi flow meter is labeled to compensate for the back pressure by the humidifier/
patient interface system.
•The numbered scale on the flow meter that corresponds to the compensated flow
rate for the Fisher & Paykel Optiflow System and Hudson RCI® Neptune® Heated
Humidifier.
•The lettered scale on the flow meter corresponds to the flow rates for the other
patient interface circuits listed in the chart in Section 2.5.
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2.0 SET-UP INSTRUCTIONS
2.1 Sensor Installation
1 2 3
Remove Max-250 sensor
and pull off barrier film.
Wait 30 to 90 minutes for
sensor to stabilize.
Attach flow diverter.
45 6
Attach sensor to sensor
cable.
Press and hold CAL button for
three (3) seconds. Wait for
display to read "20.9%".
Insert sensor into port on
MaxVenturi.
2.2 Calibration
A new calibration is required when:
•The measured O2 percentage in 100% O2 is below 97.0%.
•The measured O2 percentage in 100% O2 is above 103.0%.
•The CAL reminder icon is blinking at the bottom of the LCD.
•You are unsure about the displayed O2 percentage, see Factors Influencing
Accurate Readings in section 3.0.
The MaxVenturi can be calibrated at 100% oxygen or room oxygen (20.9%). The One Touch
calibration will assume one of these two concentrations.
2.2.1 Room Air Calibration
CAUTION: Turn off all flow of gas to the MaxVenturi before calibration in room air.
Calibrating the oxygen sensor in a gas concentration other than room air (20.9%) will result
in an incorrect measurement of oxygen concentration.
1 2 3
Shut off oxygen supply. Remove sensor from port. Wait two (2) minutes for sen-
sor to equilibrate in room air.
4 5
Press and hold CAL button
for three (3) seconds. Wait
for display to read "20.9%".
Place sensor in port.
2.2.2 100% Oxygen Calibration
1 2 3
Connect oxygen supply line
from wall to MaxVenturi.
Plug room air inlet. Turn ON/OFF valve to the
ON position.
4 5 6
Turn flow knob a few turns
to flow gas.
Wait two (2) minutes for
sensor to equilibrate.
Press and hold CAL button
for three (3) seconds. Wait
for display to read 100%.
7 8
Remove plug from room
air inlet.
Insert air inlet filter in room
air inlet port.
NOTE: Analyzer will read "Cal Err St" if the sample gas is not stable or if the oxygen sensor
has reached its end of life.
2.3 Device Set-up
NOTE: Patient circuit and patient interface should be assembled according to manufacturers
instructions supplied with them.
1 2 3
Attach MaxVenturi to IV
pole. Twist knob to tighten.
Connect oxygen supply line
from wall to MaxVenturi.
Insert air inlet filter in room
air inlet port.
4 5
Attach patient circuit to
MaxVenturi outlet.
Turn ON/OFF valve to ON
position.

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2.4 Flow and Oxygen Settings Adjustment
2.4.1 Initial Settings
1 2 3
Adjust flow to desired set-
ting and read flow meter.
Set desired oxygen mixture
by opening O2% knob and
read analyzer.
Adjust flow if it has changed.
2.4.2 Changing Flow Settings
1 2
Adjust flow to new desired flow rate. Readjust oxygen concentration to desired
setting and wait for analyzer to equilibrate.
Temporarily disconnect patient circuit if
necessary.
2.4.3 Changing Oxygen Settings
1 2
Adjust O2% knob to desired level and wait
for analyzer to equilibrate.Temporarily
disconnect patient circuit if necessary.
Verify flow rate has not changed and adjust
if necessary.
WARNING: Adjusting the oxygen setting too high at low flows may cause oxygen to
exit the air inlet port. Verify the direction of flow by placing your hand under the air filter to
feel for air escape.
2.5 Disposables
The MaxVenturi for is intended for use with approved disposables. Several patient delivery
circuits and patient interfaces have been tested and approved for use with the MaxVenturi.
The approved delivery circuits and patient interfaces are:
2.5.1 Disposable Patient Circuits
•Fisher & Paykel single heated limb circuit (RT202) with humidifier chamber
(MR290).
•Airlife single heated limb circuit (RT600-850) with humidifier chamber (MR290).
•Comfort Flo® Circuits (2415 & 2416) with the ConchaSmart® Column (382-10).
2.5.2 Disposable Patient Interfaces
•Fisher and Paykel OptiflowTM+ Nasal Cannula - Large (OPT946).
•Fisher and Paykel OptiflowTM+ Nasal Cannula - Medium (OPT944).
•Fisher and Paykel OptiflowTM+ Tracheostomy (OPT970).
•Fisher and Paykel OptiflowTM+ Mask Interface Adapter (OPT980)
•Pediatric aerosol mask with 22mm inlet (Airlife 001263 or similar).
•Adult aerosol mask (Airlife 001206 or similar).
•Trach adaptor T-piece (Airlife 001500 or similar).
•Tracheostomy mask with 22mm inlet - loose fitting (Airlife 001225 or similar).
•Hudson RCI® Trach-Flex™ PlusTracheostomy Adapter (2415-01).
•Hudson RCI® Comfort Flo® Plus Cannula - Large (2412-11).
•Hudson RCI® Comfort Flo® Plus Cannula - Medium (2412-12).
•Hudson RCI® Comfort Flo® Plus Cannula - Small (2412-13).
CAUTION: Use of patient circuits or patient interfaces other than these constitutes "off-
label use". This can result in device malfunction or harm to the patient.
The delivery circuit can be paired with the patient interface circuits listed in the table below:
TABLE INSTRUCTIONS: To determine the desired flow, locate the patient delivery circuit and
interface in the two left-hand columns. Find the corresponding flow rate by reading to the
right under columns A through F. The lettered columns correspond to the lettered gradua-
tions on the flow meter.
F&P Humidifier with 22mm Single Heated Limb
Circuit
INTERFACE PATIENT A B C D E F
Hudson RCI® Trach-Flex™ Plus
Tracheostomy Adaptor (2415-01) 7 21 31 41 49 57
Hudson RCI® Comfort Flo® Plus
Cannula - Large (2412-11) 7 18 28 36 44 52
Hudson RCI® Comfort Flo® Plus
Cannula - Medium (2412-12) 7 19 29 37 44 51
Hudson RCI® Comfort Flo® Plus
Cannula - Small (2412-13) 7 17 26 34 41 48
OptiflowTM+ Tracheostomy
(OPT970) 8 22 31 42 51 60
OptiflowTM+ Nasal Cannula
Large (OPT946) 8 20 30 40 48 56
OptiflowTM+ Nasal Cannula
Medium (OPT944) 8 18 28 37 45 53
OptiflowTM+ Nasal Cannula
Small (OPT942) 7 16 23 31 38 46
OptiflowTM+ Mask Interface Adapter
(OPT980) 7 22 32 43 52 61

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Hudson RCI® Neptune®Heated Humidifier with
ConchaSmart™ Technology and 15mm Comfort Flo
Humidification Circuit (REF 2415 & 2416)
INTERFACE PATIENT A B C D E F
Hudson RCI® Trach-Flex™ Plus
Tracheostomy Adaptor (2415-01) 7 19 29 38 46 54
Hudson RCI® Comfort Flo® Plus
Cannula Large (2412-11) 7 17 26 34 41 49
Hudson RCI® Comfort Flo® Plus
Cannula Medium (2412-12) 7 17 26 34 41 48
Hudson RCI® Comfort Flo® Plus
Cannula Small (2412-13) 6 16 25 32 39 46
CAUTION: The flow rates listed in this table are the result of bench testing the MaxVenturi
on the indicated patient circuits and interfaces. Actual flows may vary in clinical use depending
on patients physiology, breathing rate and other factors listed in Section 3.0.
NOTE: For the Comfort Flo Humidification System, a section of 22mm tubing is used to connect
the outlet of the MaxVenturi to the inlet of the humidification chamber in place of the supplied
pressure relief valve.
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.
•A change in altitude greater than 500 ft will require sensor recalibration.
•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 (see section 2.2).
3.2 Temperature Effects
The MaxVenturi will read correctly (within ±3%) when operating at thermal equilibrium within
the operating temperature range of 15 °C - 40 °C (59 °F - 104 °F). The device must be thermally
stable when calibrated and allowed to thermally stabilize after experiencing temperature
changes before readings are accurate. For these reasons it is recommended to:
•Perform the calibration procedure at a temperature close to the temperature at
which the device will be operated.
•Allow adequate time for the sensor to equilibrate to a new ambient temperature.
ATTENTION: “CAL Err St” may result from a sensor that has not reached thermal equilibrium.
3.3 Humidity Effect
The MaxVenturi can be used in applications where the relative humidity of the sample gas
ranges from 0 to 95%, non-condensing. However, it should be noted that water vapor exerts
its own pressure in the same manner as oxygen does in a sample gas stream.
For example, if the analyzer is calibrated in dry gas and then the gas is humidified, the ana-
lyzer will correctly display a reading which is slightly lower than previously displayed. This is
due to the dilution of oxygen in the sample gas by water vapor.
Additionally, gas streams of high humidity may tend to condense on the sensor. Condensation
on the sensor may eventually affect performance. For this reason, it is recommended that the
MaxVenturi be mounted so that the sensor is in a vertical position, facing downward to prevent
condensate from flowing onto the sensing surface.
4.0 CALIBRATION ERRORS AND
ERROR CODES
The analyzer has a self test feature built into the software to detect faulty calibrations, oxygen
sensor failures, and low battery voltage. The tests and actions to take if an error occurs are:
E02: NO SENSOR ATTACHED
•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.
E03: NO VALID CALIBRATION DATA AVAILABLE
•Make sure unit has reached thermal equilibrium.
•Perform calibration as described in this manual.
E04: BATTERY BELOW MINIMUM OPERATING VOLTAGE
•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. NOTE: 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
•Repeat calibration routine as described in this manual. If unit repeats this error
more than three (3) times, contact Maxtec Customer Service.
CAL ERR HI: SENSOR VOLTAGE TOO HIGH
•Repeat calibration routine as described in this manual. If unit repeats this error
more than three (3) times, contact Maxtec Customer Service.
CAL ERR BAT: BATTERY VOLTAGE TOO LOW TO RECALIBRATE
•Replace batteries.
5.0 CHANGING THE OXYGEN
SENSOR
1 2 3
Turn off analyzer. Disconnect sensor from
sensor cable.
Remove sensor from
sensor port. Dispose of
sensor according to local
guidelines.
NOTE: For new sensor installation, follow procedure for new sensor installation in section 2.1.

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6.0 CHANGING THE BATTERIES
1 2 3
Turn off analyzer. Use screwdriver to remove
four (4) screws in back of
device.
Pull front cover off away
from unit.
4 5 6
Remove battery pack from
rear wall of cavity. Use
caution with wires.
Remove two (2) depleted
batteries.
Ensure correct orientation
and install two (2) new
batteries.
7 8 9
Turn on analyzer to verify
power.
Reattach battery pack to
rear wall of cavity. Use
caution to not pinch wires
between cover and body
of device.
Re-attach front cover with
four (4) screws.
7.0 CLEANING AND MAINTENANCE
Store the MaxVenturi at a temperature similar to that of its daily use.
7.1 Routine Maintenance
Maxtec recommends the performance check listed in the MaxVenturi Preventive Maintenance
Manualbeconductedprior toplacingthe MaxVenturiintoclinical useand oncea yearthereafter.
If the MaxVenturi does not function as described in the performance check, discontinue use of
thedevicependingservicebytrainedtechniciansorcontactyourMaxtecdistributororMaxtecat:
2305 South 1070 West Salt Lake City, Utah 84119.
7. 2 Device Cleaning
When cleaning or disinfecting the exterior of the MaxVenturi, take appropriate care to prevent
any solution from entering the device. Do not immerse device in fluids. MaxVenturi external
surfaces may be cleaned using a cloth moistened with 65-70% isopropyl alcohol/water solu-
tion or a germicidal wipe.
7.3 Oxygen Sensor Cleaning
Clean the sensor with a cloth moistened with 65-70% isopropyl 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.
8.0 SPECIFICATIONS
8.1 Analyzer 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)
Dimensions .....................................................................7.3 x 6.6 x 5.3 (185mm x 167mm x 135mm)
Weight..........................................................................................................................2.54 ibs (1.15kg)
Drift of Measurement.......< +/-1% of full scale at constant temperature, pressure and humidity
8.2 Oxygen Diluter Specifications
Flow ....................................................................................................................10-55 LPM adjustable
FLOW ACCURACY NOMINAL (LPM) ACCURACY
10 ±33%
Operating Range
20 ±18%
30 ±15%
40 ±11%
50 ±11%
60 ±9%
FiO2 Range ............................................................................................................................32%-100%
Oxygen inlet supply pressure.............................................................................................45-55 psig
Oxygen inlet filter (internal).........................................................................45-90 micron pore size
Ambient air inlet filter.................................................................................. Single patient use filter
(see section 2.5 for appropriate filter details)
8.3 Oxygen Inlet Supply
This device was designed for an oxygen inlet pressure of 3.5 bar (50psi). Certain geographical
areas use 4 bar (58psi) or 5bar (73psi) as the standard piped oxygen distribution pressure. This
device can be operated at these pressures but the flow readings on the flow meter must be
corrected for the additional pressure. The table below gives correction factors for each flow
meter graduation indicating the percent increase in flow from nominal that will result due to
the increased inlet pressure at 4bar and 5bar.

ENGLISH 10 WWW.MAXTEC.COM • [phone]
NOMINAL FLOW LPM 4 BAR (% INCREASE) 5 BAR (% INCREASE)
10 - A 13 34
20 - B 9 24
30 -C 7 18
40 -D 6 16
50 - E 5 13
60 -F 4 12
9.0 MAXVENTURI SPARE PARTS AND
ACCESSORIES
9.1 Included With Your Unit
PART NUMBER ITEM
R211M03 Operating Manual & Instructions for Use
R125P03-002 MAX-250E Oxygen Sensor
RP34P02 Air inlet filter
R211P38 Muer, Venturi
9.2 Standard Replacement Parts & Accessories
PART NUMBER ITEM
R127P35 15’ coiled polyurethane oxygen hose with DISS ends.
R100P41 Locking Pole Clamp Bracket
R100P44 Pole/Rail Mount Bracket
9.3 Other Replacement Parts and Repairs
For repair or parts issues not specified in this manual refer to the MaxVenturi Service Manual
(R211M01), or the MaxVenturi Preventative Maintenance Manual (R211M02).
9.4 Preventative Maintenance
It is recommended by Maxtec that service personnel check the function of the device once
a year, or as needed. It is also recommended that the MaxVenturi's flow and O2 adjustment
valves be replaced a minimum of every 4 years with R211P30-001 and R211P30-002 to replace
all O-rings, valves, and knobs. The MaxVenturi Preventative Maintenance Manual will guide
you through these processes. It is available for free at www.maxtec.com. Equipment in need
of factory repair shall be sent to:
Maxtec
Customer Service Department
2305 South 1070 West
Salt Lake City, Utah 84119
(Include RMA number)
10.0 TROUBLESHOOTING
PROBLEM: The flow does not reach 55LPM even with the flow valve wide open.
•Possible Cause: The pressure of your piped oxygen supply in your hospital may
be low. Also check to see if the float in the flow meter is sticking. Tip the unit back
and forth. Ball should roll freely. If it seems to stick or hesitate, return the unit to
Maxtec for service. If you cannot detect the problem, contact the Maxtec Service
Department by calling the number listed in this manual. Do not disassemble the
device to try to detect an internal problem.
PROBLEM: The oxygen level on the display does not reach 100%, even with the oxygen control
knob fully open.
•Possible Cause: Check if the device needs to be calibrated. If you wish to use the
device at oxygen concentrations closer to 100% oxygen, it is best to calibrate the
device at 100% oxygen. Refer to the calibration section in this manual and follow
the 100% oxygen calibration routine. If this does not solve the problem, contact the
Maxtec Service Department.
PROBLEM: The oxygen level displayed does not go as low as the level indicated in the specifica-
tions, even with the oxygen control knob completely closed.
•Possible Cause: It is very likely the device needs to be calibrated. Also check to
make sure the humidifier and patient delivery disposables are the correct size and
installed correctly with no kinking or occlusion. Check the air inlet filter for moisture
or dirt - replace if necessary. Valve cartridges may be worn; perform leak test
according to preventative maintenance procedure.
11.0 AIR-ENTRAINMENT DEVICES VS
BLENDERS
There are basic differences in the operation of a venturi air-entrainment device, such as the
MaxVenturi, versus an air oxygen blender. Some of the differences are listed in the chart below.
Further information regarding the use of these types of devices can be found in literature such as:
R. Wilkins et. al, Egan's Fundamentals of Respiratory Care, St. Louis: Mosby, 2003.
Maxtec recognizes that the condition of the patient should be the primary factor in deciding
which type of treatment is suitable for use.
MAXVENTURI AIR-OXYGEN BLENDER
FiO2 Range: 32-100% FiO2 Range: 21-100%
No low pressure gas alarms Audible alarm for low gas pressure
or dierential gas pressure
Flow is compliant to downstream
flow resistance
Flow is less compliant to
downstream flow resistance
Requires only an oxygen supply Requires both oxygen and medical air supply
Flow: 0-60 LPM Flow: 0-120 LPM
Requires large bore tubing Supports any size tubing
12.0 ELECTROMAGNETIC
COMPATABILIT Y
The information contained in this section (such as separation distances) is in general specifi-
cally written with regard to the MaxVenturi. The numbers provided will not guarantee fault-
less 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.

WWW.MAXTEC.COM • [phone] 11 ENGLISH
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 MaxVenturi 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 MaxVenturi 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
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
Diferential 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
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 propogation
is aected by absorption and reflection from structures, objects, and people.
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 sparation 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.

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