Flow Rate Adjustment - Philips M1013A IntelliVue G1 Service Manual

Performance Assurance Tests - Checking and Calibrating the Gas Analyzer
Test
Pressure Sensor Test

Flow Rate Adjustment

For this adjustment, always measure the gas analyzer flow rate at the gas sample inlet. Measuring at the
CAUTION
outlet may lead to incorrect flow readings due to ripple on the gas flow.
In case the gas analyzer flow rate is outside the tolerance limits, it can be adjusted according to the
following procedure:
Make sure you measure the flow at the gas analyzer's inlet.
1
2 Select High Flow in the Adjust Flow pull down menu (See Figure 11).
3 Connect the sample line to the watertrap and check the difference between the sample cell pressure
and the ambient pressure. It should read between 80 and 100 mbar in the VISIA tool.
4 Connect the flowmeter to the sample line. The pressure difference may now be slightly higher than
before. A decrease of up to 150 mbar is acceptable.
Now use the < and > buttons to decrease or increase the flow until it is inside the tolerance limits.
5
Press the Save New button to store the new flow rate setting.
6
7 Switch the pump to off and then high again and check the flow in the flowmeter and in the Target
Pump Flow field in the VISIA tool.
If the flow rate cannot be brought inside the tolerance limits, the gas analyzer needs to be replaced.
Expected Test Results
Deviation between the two measured values is <10mbar
4 Testing and Maintenance
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