Instruction Manual
D103176X012
Detailed Setup and Calibration
June 2017
27
Calibration
Field Communicator Calibrate > Calibrate (1-4)
WARNING
During calibration the valve will move full stroke. To avoid personal injury and property damage caused by the release of
pressure or process fluid, isolate the valve from the process and equalize pressure on both sides of the valve or bleed off the
process fluid.
Note
If optional limit switches are being used, power must be applied to the switch circuits throughout the calibration routine. Failure to
power the switches may result in incorrect switch orientation.
Analog Input Calibration
The DVC2000 digital valve controller is shipped from the factory with the analog input already calibrated. You do not
normally need to perform this procedure. However, if you suspect that this needs adjustment, follow one of the
procedures below.
Using the Field Communicator to perform Analog Input Calibration
To calibrate the analog input sensor, connect a variable current source to the instrument LOOP+ and LOOP- terminals.
The current source should be capable of generating an output of 4 to 20 mA. Select Analog In Calib from the Calibrate
menu, then follow the prompts on the Field Communicator display to calibrate the analog input sensor.
1. Set the current source to the target value shown on the display. The target value is the Input Range Low value. Press
OK.
2. The following message appears:
Use Increase and
Decrease selections
until the displayed
current matches the
target.
Press OK when you have read this message.
3. The value of the Analog Input 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 0.4 mA, 0.04 mA, and 0.004 mA, respectively. If
the displayed value does not match the current source, press OK, then repeat this step (step 4) to further adjust the
displayed value. When the displayed value matches the current source, select Done and go to step 5.
5. Set the current source to the target value shown on the display. The target value is the Input Range High value.
Press OK.
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