IMT Analytics FlowAnalyser Series User Manual page 35

IMT Analytics AG
6.12.2 Calibration of the oxygen sensor
The oxygen sensor consists of an electrochemical cell and owing to signs of aging it
has to be recalibrated from time to time.
After the start of calibration 100% oxygen and then ambient air have to be applied
first, in accordance with the prompt by the device. In both steps it is important for
an adequate amount of the corresponding gas to flow through the main measuring
channel for a sufficient period of time. For this reason calibration takes approx. 75
seconds per gas. The optimal flow is 20 to 30 L/min and it must not be changed
during calibration.
Any modifications to the measuring screen of the Flow High or Flow
Low channel will mean that flow measurement has to be recalibrated.
This recalibration can only be performed at the manufacturer's or at
an accredited testing body.
6.12.3 Calibration of MultiGasAnalyser OR-703
Please observe the special section on this (8.7 OR sensor calibration).
Operation
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