Calibrating A Ma Input Channel - Honeywell Touchpoint Plus Technical Handbook

6.15.3 Calibrating a mA Input Channel

To calibrate a mA input channel, follow the procedure below in combination with the relevant instructions in the sensor
manual.
This procedure requires 2 people in radio or telephone contact.
Only trained technicians are authorized to carry out sensor calibration.
Where the sensor or transmitter has the facility, the mA loop should always be calibrated by forcing signal levels
at the sensor / transmitter. Any gas calibration required must be carried out at the field device according to the
The Touchpoint Plus controller calibration should not be used to adjust for deficiencies in the sensor / transmitter
Caution: Ensure that any relay operated devices (drenchers, repeater alarms, etc.) are inhibited before starting this test.
The span gas should normally be air at 20.9% v/v Oxygen if the O
force mA function.
The Touchpoint Plus controller calibration should not be used to correct deficiencies in the sensor calibration; instead
carry out a gas calibration at the sensor according to the manufacturer's instructions.
To calibrate the mA loop of an input channel, please follow the procedure below in combination with the relevant
instructions in the sensor manual.
1) Log in as Service.
2) Touch
Menu>Maintenance>Gas Calibration
3) Touch [Start] while applying clean air to the sensor.
4) Wait until the sensor reading
MAN0984_Iss 3_02/16
Pt. No. 3011M5001_3
Commissioning
manufacturer's instructions.
gas calibration. Failure to observe this can result in significant accuracy errors.
becomes stable
WARNING
sensor is not being used with a transmitter that has a
2
. Touch the channel to be calibrated followed by [Select].

.
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Touchpoint Plus
Technical Handbook