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

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Calibration A-FGC1
Document No. 8502854
B-57
N
2
O proportional function and pressure regulator adjustment
This calibration calibrates the N
2
O proportional valve drive and the N
2
O pressure regulator is adjusted
for proper maximum flow. The factors are used in the valve controller function and for calculating the
safety limit of the valve. The calibration factors are stored in EEPROM 31 and 33-34.
Equipment needed: Flow and pressure test device
Pozidriv cross-head screwdriver
Allen 4 mm
Settings: ADU On
Pipeline gases connected
Manual mode
No gas flows
N
2
O / Air selector in N
2
O position
1. Select the N
2
O high flow measurement range on the test device. Zero the test device.
2. Connect a hose between the test device high flow range inlet and fresh gas outlet on ADU.
3. Push the
Setup
key. Select Service and enter calibration password. Select Calibrations - Flow
controls - N
2
O Prop.
Figure 56 N
2
O proportional function calibration menu
4. Start calibration by selecting Start CAL .
5. Open fully the N
2
O flow.