Philips 862474 Manuale Utente
Performance Procedures
4-32
Testing the Monitor
Leakage
Check
The Leakage Check consists of two parts:
•
Part 1 - Checking the tubing between the pump outlet and the
CO
2
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
Part 2
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.
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.
tube.
3
Block the CO
2
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 CO
minute. If the value is not within the tolerance limits, there is a leakage between
the pump outlet and the CO
2
module gas outlet.
4
If a leakage is found in Step 3, open the CO
2
module and check the tubing
connections at the pump outlet and the module CO
2
gas outlet. If the connections
are good, then there is leakage in the module and the CO
2
module must be
exchanged.
Step
Action
1
Disconnect the flowmeter from the Part 1 setup and connect the flowmeter inlet
to the CO
to the CO
2
module gas outlet.
2
Leave the FilterLine connected to the CO
2
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”.
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.
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 CO
connections at the pump inlet and the CO
2
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 CO
situation remains, there is a leakage in the tubing and the CO
2
module must be
exchanged.