RKI Instruments GX-82A - Manual (Page 28)

Model GX-82A Instruction Manual
062796 RKI Instruments, Inc. 25
reading stabilizes:
3. If the reading does not correspond to the sample, press the AIR/▲
switch to increase the reading, or the (SHIFT)/▼ switch to
decrease the reading.
4. Press ON/OFF/ENTER. The END screen will show:
5. The display will automatically return to the Calibration Menu.
Press (SHIFT) to scroll down to the next desired calibration.
6. Turn off the combustible gas cylinder and disconnect it from the
valve.
Oxygen Zero
1. Connect an oxygen free or low-concentration (e.g. the RKI Four-
Gas Cylinder has 12% O
2
) known oxygen sample to the calibra-
tion adapter.
2. From the calibration menu, scroll to “3. SET O2 ZERO,” then
press ON/OFF/ENTER to start O
2
zero. The display will show:
3. Open the control valve to the sample source and set the flow to 1.0
SCFH.
HC CAL. 45LEL
GAS/ADJ./ENTER
HC CAL.
END
O2 CAL. 20.9%
GAS/ADJ./ENTER