RKI Instruments GX-2012 Manual - Manual (Page 179)

GX-2012 Operator’s Manual Bump Testing • 171
8. Disconnect the tubing from the GX-2012’s probe.
9. Repeat steps 3 through 8 for any other sensors you want to calibrate.
Make sure you use an appropriate calibration cylinder for each sensor.
CAUTION: When calibrating the oxygen channel, verify the concentration
of oxygen listed on the cylinder’s label. For oxygen-free samples
(100% nitrogen for example), set the oxygen zero setting to
0.0%.
10. After the last channel is calibrated, disconnect the calibration tubing from
the probe.
11. Use the AIRS and (SHIFT)T buttons to scroll to ESCAPE in the ONE
CAL menu.
12. Press and release the POWER ENTER button to exit ONE CAL.
13. With the ONE CAL menu option displayed, press the (SHIFT)T button
until the NORMAL menu option is displayed.
14. Press and release the POWER ENTER button to return to Measuring
Mode.
Bump Testing
NOTE: The BUMP DSP menu item in Maintenance Mode is factory set to
OFF. The BUMP menu item will not appear unless BUMP DSP is
set to ON. See “Turning the Bump Test Function On or Off” on
page 125 for instructions.
NOTE: The GX-2012 uses parameters defined in the BUMP--SET menu
item of Maintenance Mode while performing a bump test. To view
or update these parameters, see “Updating the Bump Test
Parameters” on page 127.
NOTE: If the combustible gas channel(s) are calibrated to a gas other than
methane, use an appropriate multigas cylinder.