RKI Instruments GX-2012 Manual - Manual (Page 35)

GX-2012 Operator’s Manual Start Up, Normal Mode • 27
NOTE: If the CO DISP parameter in Maintenance Mode is set to On, the
CO channel will appear in Leak Check Mode. If the CO DISP
parameter is set to OFF (factory setting), the CO channel will not
appear in Leak Check Mode. See “Chapter 5: Using the GX-2012 in
Leak Check Mode” on page 84 for more information.
You can scroll up or down through these screens using the AIRS or
(SHIFT)T buttons.
6. With the Normal Mode Select Screen displayed, press and release the
POWER ENTER button and continue with the startup sequence as
described in the previous section, “Turning On the GX-2012, Normal
Mode Only”, from step 4 on page 20 on.
NOTE: If no button is pressed for 20 seconds, the unit will proceed into
whichever mode is displayed.
7. To exit Normal Mode and return to the Mode Select Screen, press and
hold the (SHIFT)T button for 5 seconds while in the Normal Operation
Screen.
Performing a Fresh Air Adjustment, Normal Mode
Before using the GX-2012, it is recommended to set the fresh air readings for
the target gases by performing a fresh air adjustment. This will set the
combustible gas, CO, and H
2
S channels to zero and the OXY channel to
20.9%.
1. Find a fresh-air environment. This is an environment free of toxic or
combustible gases and of normal oxygen content (20.9%).
2. Turn on the unit as described above in “Turning On the GX-2012,
Normal Mode Only” or “Turning On the GX-2012 in Normal Mode With
All Modes Active”.
3. Press and hold the AIRS button. The display prompts you to hold the
AIRS button.
4. Continue to hold the AIRS button until the display prompts you to
release the AIRS button. The GX-2012 will count down from 8 on an
autoranging combustible gas channel as it sets the fresh air reading for all
AIr
CAL
HOLD AIR