RKI Instruments GX-8000(H4-0050) - Manual (Page 20)

3 Span Adjustment 3-3. Span adjustment
GX-8000 - 20 -
(Only TYPE-A, E)
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). Prepare and supply the zero
gas.
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.
Supply the zero
gas.