RKI Instruments GX-2012 Manual - Manual (Page 119)

GX-2012 Operator’s Manual Using Maintenance Mode • 111
LCD will indicate that the calibration has ended, then the single
calibration menu displays.
12. Disconnect the tubing from the probe.
13. Repeat steps 2 through 12 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%.
14. After the last channel is calibrated, disconnect the calibration tubing from
the probe, then unscrew the demand flow regulator from the calibration
cylinder.
15. Use the AIRS and (SHIFT)T buttons to scroll to ESCAPE in the ONE
CAL menu.
16. With the ONE CAL menu option displayed, press the (SHIFT)T button
until the NORMAL menu option is displayed.
17. Press and release the POWER ENTER button to return to Measuring
Mode.
Performing a Bump Test
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.
If the BP RMNDR menu item in Maintenance Mode is set to ON (see
“Updating the Bump Test Reminder Setting” on page 133), and the BP
EXPRD menu item in Maintenance Mode is set to NOT USE (see “Updating
the Bump Test Expired Action Setting” on page 133) and a bump test
becomes due, then the sensors must be bump tested using this menu item
because it will not be possible to enter normal operation. See “Calibration/
Bump Test Supplies and Equipment” on page 57 for the items you will need