Honeywell Sensepoint XCD RFD, Technical Handbook

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Sensepoint XCD RFD Technical Manual SPXCDHMRFEN Issue 4_08-2016
30
(ZERO CALIBRATION)
WARNING
When calibrating the Sensepoint XCD Flammable IR or CO
2
IR sensors, it is essential that
the zero calibration is always followed by a span calibration. The zero calibration must never
be done alone.
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 (see Section 4.3) 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 ‘

’ to select ‘No’ and ‘

’ to return to configuration mode.
WARNING
When calibrating the Flammable IR or CO
2
IR sensors, it is essential that the span calibration
is done after a zero calibration.