7.12.2 Restoring Factory Adjustment
Always restore factory adjustment before entering a new adjustment. This prevents any
possible earlier adjustments having an eect on the new adjustment you make.
To restore factory adjustment:
1. Connect to the wireless configuration interface and open the Calibration menu.
2. Start the calibration mode with the Start calibration button.
3. On the Calibration tab, scroll down to the parameter you want to adjust (for example,
CO2 adjustment) and select Restore factory adjustment.
4. Restore the factory adjustment with the Restore factory adjustment button for each
parameter separately as needed.
5. To verify that the factory adjustment was restored, check the adjustment data
information at the bottom of the Calibration tab view.
6. Close the calibration mode with the Stop calibration button.
7.12.3
Calibration PIN Code
Probe calibration can be locked and unlocked with a calibration PIN code in the Indigo
transmitter's Settings > Probe menu. By default, the calibration PIN code is in place and
calibration is enabled. Do not remove the PIN code from the probe settings unless you need
to block access to calibration settings.
For GMP252, the calibration PIN code is 1300.
7.12.4
1-point Adjustment with Indigo
Prepare the calibration reference (for example, a reference gas with a known concentration)
before starting the adjustment.
GMP252 User Guide M211897EN-D
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