GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 65
6 . See “Exiting the BUMP SET Menu” on page 67 to return to User Mode.
CHECK
CHECK is the bump test tolerance value and is represented as a percentage of the calibration
gas concentration. It is the percentage that the bump test reading can differ from the actual gas
concentration and still be considered a passed bump test. If the bump test reading differs more,
the bump test will fail. The available values are 10%, 20%, 30%, 40%, and 50% (factory
setting).
1 . After entering the BUMP SET\SETTINGS menu, press AIR to scroll to CHECK.
2 . Press and release POWER MODE. The current setting flashes.
3 . Use AIR to display the desired setting.
4 . Press and release POWER MODE to save the setting and return to the CHECK menu
item.
5 . See “Exiting the SETTINGS Menu” on page 66 to return to the BUMP SET menu.
6 . See “Exiting the BUMP SET Menu” on page 67 to return to User Mode.
CAL TIME
The CAL TIME is the total time the instrument is exposed to calibration gas when a bump
test fails if AUTO CAL is set to ON. The bump test time is deducted from the calibration
time. For example, if the CAL TIME is set to 90 seconds and the GAS TIME is set to 30
seconds, if the bump test fails, the GX-3R will only be exposed to gas for an additional 60
seconds. The available values are 90 seconds (factory setting), and 120 seconds.
1 . After entering the BUMP SET\SETTINGS menu, press AIR to scroll to CAL TIME.
2 . Press and release POWER MODE. The current setting flashes.
3 . Use AIR to display the desired setting.
4 . Press and release POWER MODE to save the setting and return to the CAL TIME
menu item.
5 . See “Exiting the SETTINGS Menu” on page 66 to return to the BUMP SET menu.
6 . See “Exiting the BUMP SET Menu” on page 67 to return to User Mode.
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