Honeywell Touchpoint Pro Technical Handbook page 70

CALIBRATING GAS SENSORS
To calibrate a channel mA loop, follow the procedure below in conjunction with the relevant sensor manual.
The channel must be inhibited before calibration is allowed. The channel may be inhibited from the Inputs icon popup menu
or the Gas Calibration screen.
1. Login as an Administrator or Engineer
2. From the System Status screen select the Inputs icon then select the channel to be calibrated
3. Select Gas Calibration from the popup menu
4. Select Inhibit to inhibit the channel, if not already inhibited.
5. Select Zero Adjust, and when ready select OK
6. Generate a zero signal at the sensor by forcing the output to 4 mA or if this function is not supported by applying
Zero Gas
7. View the sensor signal reading until it is stable, and then select Accept
8. Confirm that the gas concentration reading is zero, and select Save then OK
9. Select Span Adjust
Part. No. 2400M2501_6
Figure 76. mA Calibration Screen
Figure 77. mA Zero Calibration
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Touchpoint Pro
Technical Handbook