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DVC6000 Digital Valve Controllers
September 2013
5-2
Calibration Overview
When a DVC6000 digital valve controller is ordered as
part of a control valve assembly, the factory mounts
the digital valve controller on the actuator and
connects the necessary tubing, then sets up and
calibrates the controller. For remote-mounted digital
valve controllers, the DVC6005 base unit ships
separately from the control valve and does not include
tubing, fittings or wiring.
For digital valve controllers that are ordered
separately, recalibration of the analog input or
pressure sensors generally is unnecessary. However,
after mounting on an actuator, perform the initial setup
(either auto or manual), then calibrate travel by
selecting Calibrate, Travel Calibration, and Auto
Calibration from the Configure menu. For more
detailed calibration information, refer to the following
calibration procedures, available from the Calibrate
menu:
Travel Calibration
Auto Calibration —This procedure automatically
calibrates the travel. The calibration procedure uses
the valve and actuator stops as the 0% and 100%
calibration points.
Manual Calibration —This procedure permits
manual calibration of the travel. This calibration
procedure allows you to determine the 0% and 100%
calibration points and obtain the optimum linearity on a
sliding-stem valve.
Sensor Calibration
Pressure Sensors—This procedure permits
calibrating the three pressure sensors. Normally the
sensors are calibrated at the factory and should not
need calibration.
Travel Sensor—This procedure permits
calibrating the travel sensor. Normally the travel
sensor is calibrated at the factory. Calibrating the
travel sensor should only be necessary if the travel
sensor is replaced.
Analog In—This procedure permits calibrating
the analog input sensor. Normally the sensor is
calibrated at the factory and should not need
calibration.
Relay Adjustment—This procedure permits
adjustment of the pneumatic relay.
Restore Factory Settings—This procedure permits
you to restore the calibration settings back to the
factory settings.
To display the calibrate menu, from the Online menu,
select Configure and Calibrate.
Note
The Instrument Mode must be Out Of
Service and the Protection set to None
before the instrument can be calibrated.
If you are operating in burst mode, we
recommend that you disable burst before
continuing with calibration. Once
calibration is complete, burst mode may
then be turned back on.
WARNING
During calibration the valve will move
full stroke. To avoid personal injury
and property damage caused by the
release of process fluid or pressure,
isolate the valve from the process and
equalize pressure on both sides of the
valve or bleed off the process fluid.
Travel Calibration
There are two procedures available for calibrating
travel:
Auto Calibration
Manual Calibration
Once the travel is calibrated by performing either the
Auto Calibration or Manual Calibration procedures, the
travel calibration can be “touched-up” using Touch-Up
Travel Calibration.
Auto Calibration (1-3-1-1)
User interaction is only required with Auto Calibrate
Travel when the feedback connection is SStem -
Standard (Sliding Stem - Standard). A feedback
connection of Rotary - All, SStem - Roller (Sliding
Stem - Roller) requires no user interaction and you
can start with step 6.
For a SStem - Standard feedback connection,
interaction provides a more accurate crossover
adjustment. Setting crossover establishes the zero
degree point for the geometric correction used to
translate the rotary motion observed by the travel
sensor into the linear motion of the sliding-stem valve.
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