GE Datex-Ohmeda Aisys Carestation Reference Manual page 169

6.7 Alternate O
Flow Accuracy Test
M1046983 04/08
flowmeter tests
2
1. Open the O cylinder valve or connect an O
2
2. Rotate the Alt O
2
3. Press the Alternate O
The flowmeter should indicate 0.5 to 0.7 L/min.
4. Rotate the flow control counterclockwise (increase). The ball should rise
immediately after rotation is begun. It should rise smoothly and steadily with
continued counterclockwise rotation. When a desired flow is set, the ball should
maintain in a steady position.
5. Rotate the flow control clockwise to minimum flow.
6. Press the Alternate O
Note: To check flow accuracy, be sure that the flow test device is capable of measuring
0–15 l/min with an accuracy of ±2% of reading.
To perform the test, you must gain access to the mixer outlet tubing which is connected
to the inlet of the electronic vaporizer.
1. To access the electronic vaporizer, refer to Section 9.7
2. Disconnect the mixer outlet tube at the inlet to the electronic vaporizer.
3. Connect a flowmeter to the mixer outlet tubing.
4. Press the Alternate O
5. Adjust the flowmeter so the c c c c e e e e n n n n t t t t e e e e r r r r of the ball aligns with the selected test point
(observe that the ball maintains a steady position for 10 seconds).
6. The test device reading should be between the limits shown for each of the selected
settings in the table below.
Flowmeter Setting
minimum
maximum (valve fully open)
7. Rotate the flow control clockwise to minimum flow.
8. Close the O cylinder valve or disconnect the O
2
9. Remove the test device.
10.Connect the mixer outlet tubing to the electronic vaporizer.
11.Reassemble the machine.
12.Perform the Preoperative Checkout Procedure
(refer to the User's Reference manual).
2
flow control fully clockwise to minimum flow.
switch to turn on Alternate O
2
switch to turn off Alternate O
2
switch to turn on Alternate O
2
Lower Limit
L/min
(valve fully closed)
1
3
5
10
6 Installation and Maintenance
pipeline.
flow.
2
flow; confirm yes.
2
flow.
2
Flow Tester Reading
Upper Limit
l/min l/min
0.5 0.7
0.5 1.5
2.5 3.5
4.5 5.5
9.0 11.0
10.0 13.0
pipeline.
2
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