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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
Manual be conducted prior to placing the MaxVenturi into clinical use and once a year thereafter.
If the MaxVenturi does not function as described in the performance check, discontinue use of
the device pending service by trained technicians or contact your Maxtec distributor or Maxtec at:
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.
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