GE Centiva/5 Plus, Technical Reference Manual

Page: 57 / 214

4 Test and calibration
TRM, Centiva/5 Plus, M1047448/ CM-922026, rev. 3.50.a of 11/05 4-23
RATED ACTUAL
0 mbar
500 Digit
250 Digit
10 L/Min
0 mbar
513 Digit
254 Digit
351 Digit
Pat.Pressure
Exp.flow
AIR flow ON
O2 flow ON
Gain correction
Note
Continuation from previous page
16. Use the ComWheel to increase the O2 flow to read 30.0 L/min on the “O2
flow” “Rated” The units in the service menu change from Digits to L/Min .
17. Verify that the external flow meter device reads 30
±
1.5 L/Min.
18. If not, readjust the “Gain” for the O2 flow sensor with R 303 on the main
board to read 30
±
1.5 L/Min.
19. Use the ComWheel to decrease the O2 flow to read 0 L/min.
20. Check the “O2 flow”
“Actual” to be at the
“Rated” value
±
50 digits.
21. If not, readjust the “Zero”
for the O2 flow sensor with
R 306 on the main board to read the “Rated” value
±
10 digits.
22. Use the ComWheel to increase the O2 flow to read 10.0 L/min on the “O2
flow” “Rated”.
23. Verify that the external flow meter device reads 10
±
0.5 L/Min.
24. If not, go back to step 16. Change setting for 30 l/min within the tolerance
in the desired direction to match the 10
±
0.5 L/Min.
25. Use the ComWheel to increase the O2 flow to read 60.0 L/min on the “O2
flow” “Rated”.
26. Verify that the external flow meter
device reads 60
±
3.0 L/Min.
27. If not, go back to step 16. Change
setting for 30 l/min within the
tolerance in the desired direction to
match the 60
±
3.0 L/Min.
28. If the O2 flow cannot be calibrated
within the three flow specifications,
check O2 gas filter.
Best results for linearity match with all three test flows are received when initially
the “Gain” is adjusted at 30 l/min value of step 16. to read 29.8 L/min on the
external flow meter device.