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

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Calibration A-FGC1
Document No. 8502854
B-55
N
2
O/Air flow sensor calibration
This calibration calibrates the N
2
O/Air flow sensor, the bypass flow sensor for N
2
O and the counter
pressure sensor for N
2
O and Air, which is used for the occlusion alarm. The flow calculation is divided
in two parts, one second order and one linear calculation. The calibration factors are stored in
EEPROM 9-12, 17-24 and 58-61.
Note: The flow sensor needs to be calibrated with both Air and N
2
O flow.
Equipment needed: Flow test device
Settings: ADU On
Pipeline gases connected
Manual mode
No gas flows
N
2
O / Air selector in Air position
Figure 53 Low flow calibration setup (to the left) and high flow calibration setup (to the
right)
Figure 54 N
2
O/Air flow sensor calibration menu