Calibration Handbook
136 Sensepoint XCD
Zero Calibration
1. If the ambient air is NOT considered reliable to use to set the ZERO, then remove the weather protection
and fit the Gassing Cap accessory onto the sensor and apply a clean source of zero gas or compressed air.
2. To access the calibration menu, hold the end of the magnet over the switch located at the top center of
the detector display (✓) for at least 3 seconds and then remove.
3. The display will indicate the first configuration mode menu ‘SEt CAL’.
4. Put the magnet over the ‘✓’ switch again and move to enter the Calibration menu.
5. The display will show the current gas reading, and the ‘
’ icon flashes.
6. When the zero gas reading is stable use ‘✓’ to confirm zero calibration.
7. If successful the display shows ‘ZEro PASS’ (if not successful, the display shows ‘ZEro FAIL’ and returns
to configuration mode).
8. If using zero-air, turn it off. Zeroing is complete and saved.
9. The display shows ‘SPAn’ with ‘YES’ flashing.
10. If span calibration is required use ‘✓’ proceed to the next step. If span calibration is not required, use ‘TS’
to select ‘No’ and ‘✓’ to return to configuration mode.
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