RKI Instruments GX-8000 - High Concentration Combustible Gas Sensor Zero Adjustment (VOL Z. CAL)

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7-4. High Concentration Combustible Gas Sensor Zero
Adjustment (VOL Z. CAL) for Type A and E Only
VOL Z.CAL
Press the ENTER switch.
Return to VOL Z.CAL
Stop supplying
the zero gas.
The VOL Z.CAL display blinks. Until the combustible
gas range switches to VOL%, the combustible gas
concentration is displayed as ---.
The current concentration readings of the
combustible gas and oxygen are displayed
(prompting for supply).
Screw the demand flow regulator into the 100% N2
gas cylinder. 100% N2 must be used or the zero
adjustment will not be accurate. Use the calibration
tubing to connect the regulator to the probe.
In about 60 seconds after supplying the zero gas
when the readings are stabilized, press the ENTER
switch to perform adjustment.
After the zero adjustment is successfully completed
and END is displayed, the gas monitor automatically
returns to the menu.
Disconnect the calibration tubing from the probe.
Supply the zero
gas.