Instruction Manual
D103785X012
Calibration
June 2017
46
Sensor Calibration
Pressure Sensors
Note
The pressure sensor is calibrated at the factory and should not require calibration.
Output Pressure Sensor
To calibrate the output pressure sensor, connect an external reference gauge to the output being calibrated. The
gauge should be capable of measuring maximum instrument supply pressure. Depending upon the sensor you wish to
calibrate, select
either
Output A Sensor
or
Output B Sensor.
Follow the prompts on the Field Communicator display to
calibrate the instrument's output pressure sensor.
1. Adjust the supply pressure regulator to the maximum instrument supply pressure. Press OK.
2. The instrument reduces the output pressure to 0. The following message appears.
Use the Increase and Decrease
selections until the displayed
pressure matches the output x
pressure.
Press OK when you have read the message.
3. The value of the output pressure appears on the display. Press OK to display the adjustment menu.
4. From the adjustment menu, select the direction and size of adjustment to the displayed value.
Selecting large, medium, and small adjustments causes changes of approximately 3.0 psi/0.207 bar/20.7 kPa, 0.30
psi/0.0207 bar/2.07 kPa, and 0.03 psi/0.00207 bar/0.207 kPa, respectively.
5. The instrument sets the output pressure to full supply. The following message appears.
Use the Increase and Decrease
selections until the displayed
pressure matches the output x
pressure.
Press OK when you have read the message.
6. The value of the output pressure appears on the display. Press OK to display the adjustment menu.
7. From the adjustment menu, select the direction and size of adjustment to the displayed value. If the displayed value
8. Place the instrument In Service and verify that the displayed pressure matches the measured output pressure.
