Calibration; Calibration With Atmospheric Air - Systech Instruments EC900 series Operator's Instruction Manual

13.0 CALIBRATION

Calibration should be carried out using a gas which is in the same range as the gas that is being
analysed.
For applications in the percentage range, the calibration may be carried out using atmospheric air.

13.1 Calibration with Atmospheric Air

EC9x0 EC9x1
Set up the instrument such that atmospheric air is circulating through the instrument, either
1.
with a pump or compressed air. Make sure the pressure is the same as the sample gas.
2.
Enter the set-up mode by pressing
3. Once in the CAL mode the default value is 20.9%
4 Enter the CAL mode by pressing
By pressing the ENTER button the instrument will automatically reset itself to 20.9% and
5
continue to measure the oxygen content of the air
6 Continue pressing
EC9x3
Set up the instrument such that atmospheric air is circulating through the instrument, either
1
with a pump or compressed air. Make sure the pressure is the same as the sample gas
2 Enter the set-up mode by pressing
3
Once in the SPH1 mode the default value is 20.9%
4 Enter the CAL mode by pressing
By pressing ENTER the instrument will automatically reset itself to 20.9% and continue to
5
measure the oxygen content of the air
6 Continue pressing
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EC900 Series Operation Manual
on the front panel of the instrument.
to return to oxygen measurement.
See Front Panel Guide
on the front panel of the instrument
to return to oxygen measurement. See
Front Panel Guide
V4.7
Page
20