OPERATING MANUAL OXYGEN MONITORING SYSTEM
OMS 420
35
9.7.8
Adjustment 4 mA – 20 mA (factory only)
Connect precision 100 Ohm resistor (0.1% tolerance) to both analog outputs of O
2
and CO measurements.
Measure the voltage across the resistors using a precision digital multi-meter.
PREV or NEXT
move cursor
EDIT
change value by means of UP/DOWN, until you read 400mV, up to2000mV on the multi-meter
OK
save
values
BACK
return to calibration menu
Note:
The 4 – 20mA analog output factory adjustment can deteriorate over time, so measured values must be verified occasionally.
Only authorized persons or manufacturers trained staff are allowed to perform adjustments on the OMS420.
COe measurement
analog output
O
2
measurement
analog output
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