102 • Using Maintenance Mode
GX-2012 Operator’s Manual
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 AIR
and (SHIFT)
buttons to scroll to ESCAPE in the ONE CAL menu.
16. With the
ONE CAL
menu option displayed, press the (SHIFT)
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 115 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 116.
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 121), and the
BP EXPRD
menu item in
Maintenance Mode is set to NOT USE (see “Updating the Bump Test Expired Action
Setting” on page 121) 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 56 for the items you will need
to perform a bump test. These instructions assume you are using a 4-gas cylinder and a
%volume cylinder.
1. Before performing a bump test, perform a fresh air adjustment as described in
“Performing a Fresh Air Adjustment” on page 96.
2. Install the demand flow regulator onto the calibration cylinder.
3. Connect the sample tubing to the demand flow regulator.
4. Install the hose and probe to the GX-2012.
5. Use the AIR
or (SHIFT)
buttons to display the
BUMP
menu item.
MAINTENANCE
BUMP
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