Instruction Manual

Instruction Manual
D103176X012
Detailed Setup and Calibration
April 2014
53
Tuning
WARNING
Changes to the tuning set may cause the valve/actuator assembly to stroke. To avoid personal injury and property damage
caused by moving parts, keep hands, tools, and other objects away from the valve/actuator assembly.
Automatic
Field Communicator Calibrate > Calibrate > Auto Tuner (1-4-5)
The auto tuner is used to optimize digital valve controller tuning. It can be used on most sliding-stem and rotary
designs, including Fisher and other manufacturers' products. Moreover, because the auto tuner can detect internal
instabilities before they become apparent in the travel response, it can generally optimize tuning more effectively than
manual tuning.
Manual
If the auto tuner does not provide the desired responsiveness, you can manually tune the DVC2000. Refer to Setting
Response, page 44.
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
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.