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For a short time after turning on the instrument
some displays may vary slightly from Zero until the optimal
operating temperature is reached (10 to 15 Min).
Therefore zero calibrations must not be performed, as long the
instrument is cold.
7.12.2 Calibrating the
Oxygen Sensor
The oxygen sensor consists of an electrochemical cell and has to
be recalibrated from time to time as a result of aging.
When you start the calibration 100% oxygen and then ambient air
must be applied, as instructed by the device. During both steps it
is essential that enough of each gas flows through the main
measuring channel for a sufficient duration.
The calibration takes 75 seconds for each gas. The optimal flow is
20 to 30 l/min and may not be changed during the calibration
process.
7.12.3 Calibrating the
MultiGasAnalyzer
TM
MGA-3050
Please refer to the special chapter regarding the
MultiGasAnalyzer
TM
MGA-3050 .
If you make any changes to the measuring screen of
the High flow or Low flow channel, flow measurement will have
to be recalibrated. Recalibration can only be carried by the
manufacturer or an authorized metrology station.
During a zero calibration it is important that no
pressure or flow is applied to any connector!
Attention: When performing the offset calibration using Zero!
these warnings are not displayed on the display.