GX-6000 Operator’s Manual Using Maintenance Mode • 162
2 . Press and release POWER/ENTER. The Fresh Air Adjust Screen
appears.
3 . Use â–²AIR or SHIFT â–¼ (PANIC) to display the desired setting.
4 . Press and release POWER/ENTER to save the setting and return to the
main menu.
Updating the Demand Zero Setting
With DEMAND ZERO set to ON (factory setting), you can manually
perform a fresh air adjust in Measuring Mode by pressing the
â–² AIR button.
With DEMAND ZERO set to OFF, you cannot manually perform a fresh air
adjust in Measuring Mode.
1 . From the main menu, place the cursor next to DEMAND ZERO.
2 . Press and release POWER/ENTER. The Demand Zero Screen appears.
3 . Use â–²AIR or SHIFT â–¼ (PANIC) to display the desired setting.
4 . Press and release POWER/ENTER to save the setting and return to the
main menu.
Zero Follower Settings
The ZERO FOLLOWER setting is not intended for field adjustment. The
default setting for most target gases is ON. The default setting for carbon
dioxide channels and some configurations of non-standard toxic gas channels
is OFF. The oxygen channel does not support this feature.
Zero Suppression Settings
The ZERO SUPPRESS setting is not intended for field adjustment. The
typical setting is 2% of full scale. The oxygen channel does not support this
feature.
Updating the Autoranging Setting
NOTE: Although IR AUTO RANGE always appears in Maintenance
Mode, it only has an effect on instrument operation when an IR
sensor is installed.
With IR AUTO RANGE set to AUTO RANGE (factory setting), the IR
channel’s gas reading will be displayed in %LEL until the gas level reaches
100 %LEL, or 5.0 %vol for methane. Once the gas reading is above 100
%LEL, it is displayed in %vol. Alarm points exist for the %LEL range but do
not exist for the %vol range.
If IR AUTO RANGE is set to LOW ONLY, the IR channel’s gas reading
will only be displayed in %LEL up to 100 %LEL.
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