MaxTech 800 Bedienungsanleitung Seite 21
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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 specifications,
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: 21-100%
Flow is less dependent on inlet pressure
Audible alarm for low gas pressure or differential
gas pressure
Flow is less compliant to downstream flow
resistance
Requires both oxygen and medical air supply
Flow: 0-120 LPM
Supports any size tubing
FiO2 Range: 30-100%
Flow is dependent on inlet pressure
No low pressure gas alarms
Flow is compliant to downstream flow resistance
Requires only an oxygen supply
Flow: 0-60LPM
Requires large bore tubing
- MaxVenturi 1
- CLASSIFICATION 3
- WARNINGS 4
- CAUTION: 5
- ATTENTION: 5
- TABLE OF CONTENTS 6
- 1.0 SYSTEM OVERVIEW 7
- 2.0 SET-UP INSTRUCTIONS 9
- 2.2 Calibration 10
- 2.2.1 Room Air Calibration 10
- 2.2.2 100% Oxygen Calibration 11
- 2.3 Device Set-up 12
- 2.4.1 Initial Settings 13
- 2.4.2 Changing Flow Settings 13
- 2.5 Disposables 14
- 2.5.3 Inlet Filter: 15
- 3.2 Temperature Effects 16
- 5.0 CHANGING THE BATTERIES 17
- 7.0 CLEANING AND MAINTENANCE 18
- 8.0 SPECIFICATIONS 19
- 10.0 TROUBLESHOOTING 21
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