MultiGasAnalyser OR-703
46
7
IMT Analytics AG
Ambient air calibration of the infrared measurement should be performed at regular
intervals and after any replacement of the airway adapter.
The need for ambient air calibration is indicated on the monitor by an alarm message
"Calibration of OR Sensor!". (After calibration the message disappears).
Ambient air calibration can also be performed if an offset is found in the gas meas-
urements. The gas measurements should be checked with a reference measuring
instrument. Calibration is performed by attaching a new airway adapter to the OR
sensor. The airway adapter must not be connected to the air circuit. Then the cali-
bration procedure begins in the menu of FlowAnalyser (6.12.3 Calibration of Mul-
tiGasAnalyser OR-703). If the sensor is in the correct position, it will click into place.
Before continuing, please wait 30 seconds because the sensor has to warm up first.
If the airway adapter is being replaced, a zero calibration must be
performed. If the airway adapter is being replaced, a zero calibration
must be performed.
It is important to ensure that during calibration there is no flow through the airway
adapter. For successful ambient air calibration it is essential to have ambient air con-
ditions (21% O
2
and 0% CO
2
)!
After calibration the readings should always be checked in order to obtain correct
readings with certainty during subsequent measurements.
7.7 OR sensor calibration
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