RKI Instruments GX-86A - Manual (Page 26)

Model GX-86A Instruction Manual
RKI Instruments, Inc. Page 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.
4. The reading should fall to near zero for an oxygen-free sample, or
HC CAL. 45LEL
GAS/ADJ./ENTER
HC CAL.
END
O2 CAL. 20.9%
GAS/ADJ./ENTER