Performance Procedures

Leakage The Leakage Check consists of two parts:

Check

•Part 1 - Checking the tubing between the pump outlet and the CO2 module outlet.

•Part 2 - Checking the tubing between the pump inlet and the FilterLine inlet.

Note

Check the flowmeter’s user guide for details on how to make a correct flow reading.

Part 1

Step

Action

 

 

1

Check the ambient and cell pressure shown in the status line on the screen. The

 

cell pressure should be approximately 20 mmHg (2.7 kPa) lower than the

 

ambient pressure.

 

 

2

Connect the flowmeter outlet to the FilterLine inlet using a flexible connecting

 

tube.

 

 

3

Block the CO2 module outlet using your fingertip and observe the flowmeter

 

display. The value on the flowmeter (X2) should decrease to between 0 and 4 ml/

 

minute. If the value is not within the tolerance limits, there is a leakage between

 

the pump outlet and the CO2 module gas outlet.

4

If a leakage is found in Step 3, open the CO2 module and check the tubing

 

connections at the pump outlet and the module CO2 gas outlet. If the connections

 

are good, then there is leakage in the module and the CO2 module must be

 

exchanged.

Part 2

Step

Action

 

 

1

Disconnect the flowmeter from the Part 1 setup and connect the flowmeter inlet

 

to the CO2 module gas outlet.

2

Leave the FilterLine connected to the CO2 module inlet.

3

Block the inlet of the FilterLine using your fingertip and observe the flowmeter

 

display. The value on the flowmeter (X3) should decrease to between 0 and 4 ml/

 

minute. If the value is within the tolerance limits, there are no leakages and the

 

leakage check is completed. You can proceed to the “Pump Check”.

 

 

4

If the value is not within the tolerance limits, there is a leakage between the

 

FilterLine inlet and the pump inlet.

 

 

5

Check the FilterLine connections and open the monitor to check the tubing

 

connections at the pump inlet and the CO2 module gas inlet. If the connections

 

are good, try replacing the FilterLine and repeating the leakage check. If the

 

situation remains, there is a leakage in the tubing and the CO2 module must be

 

exchanged.

4-32Testing the Monitor

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Philips 862478, 862474 manual Part
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862474, 862478 specifications

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