Datex-Ohmeda Anesthesia Delivery Unit S/5 Technical Reference Manual page 282

Datex-Ohmeda ADU
1. Push the
controls - N
to Air low flow range). Zero the Test Device before connecting the tube.
2. Start calibration by selecting Start CAL.
3. Adjust air flow (read on the ADU display) to the first calibration point (1.0 l/min.). Let value
stabilize.
4. Give reference flow (read on Test Device) by selecting Give Flow and turning
ComWheel
5. Repeat steps (4) and (5) for three more calibration points at 3.0, 7.0 and 11.0 l/min. (for 7.0
and 11.0 l/min. select air high flow range on Test Device and connect a larger tube). Acceptable
reference values are within ± 15% of the requested calibration points.
6. When the status 'Calibration OK' is displayed, you can save the calibration by selecting Save
CAL or abort the calibration by selecting Abort CAL. If the status is 'Calibration Failed', abort
the calibration by selecting Abort Cal.
7. Close Air flow control and turn N
8. Setup Test Device to N
or high flow measuring range and repeat steps 4 to 7 with N
NOTE: Maximum N
This is not a fault proceed with the calibration as long you can attain 9.5l/min. If below 9.5l/min.
check first the pipeline inlet pressures is in specifications and secondly adjust the N
step A-C below.
A)
B)
the test device.
C)
N O
2
Figure 55
9. Select Previous menu. Perform the needed calibrations according to the Calibration Tree.
B-56
Setup
key. Select Service and enter calibration password. Select Calibration - Flow
O & Air. Connect the Test Device to the fresh gas outlet with a tube (Test Device set
2
when the given air flow corresponds to the flow in Test Device.
O flow range measurement, with the Test Device set for appropriate low
2
O flow 11 l/min. may not be attained even with the N
2
Remove the rear plastic cover (8 Allen screws), fold down the gas inlet part on the A-WGU (2
Allen screws) and open the rear cover of the fresh gas control unit (9 Pozidriv screws).
Adjust the screw on the top of the N
Refit covers in reversed order after adjustment.
Air O
2
A-FGC1 Pressure regulators
O/Air Selector in position N
2
O pressure regulator until the flow indicates 10l/min. on
2
ComWheel
O.
2
O.
2
O flow control fully open.
2
O regulator as
2
Document No. 8502854
. Push