Instruction Manual
D103412X012
Calibration
July 2013
214
If a double‐acting relay is used, you will be prompted to run the relay adjustment when auto or manual calibration is
selected. Select Yes to adjust the relay, select No to proceed with calibration. For additional information, refer to Relay
Adjustment in this section.
Note
Relay Adjustment is only available for the double‐acting relay (Relay A).
Auto Calibration
Field Communicator TB > Configure/Setup > Calibration > Auto Calibration
Follow the prompts on the Field Communicator display to automatically calibrate travel.
1. The auto calibration procedure is automatic. It is completed when the Calibration menu appears.
During calibration, the instrument seeks the high and low end points and the minor loop feedback (MLFB) and output
bias. By searching for the end points, the instrument establishes the limits of physical travel, i.e. the actual travel 0 and
100% positions. This also determines how far the relay beam swings to calibrate the sensitivity of the MLFB sensor.
2. Place the instrument In Service and verify that the travel properly tracks the current source.
Manual Calibration
Field Communicator TB > Configure/Setup > Calibration > Manual Calibration
Note
0% Travel = Valve Closed ; 100% Travel = Valve Open
1. From the adjustment menu, select the direction and size of change required to set the travel at 0% (move the valve
to close). Selecting large, medium, and small adjustments causes changes of approximately 10.0%, 1.0%, and 0.1%,
respectively, to the travel feedback movement. Selecting Next will implement the adjustment.
If another adjustment is required, repeat step 1. Otherwise, select Done and go to step 2.
2. From the adjustment menu, select the direction and size of change required to set the travel to 100% (move the
valve to open).
If another adjustment is required, repeat step 2. Otherwise, select Done and go to step 3.
3. Enter the name of the person performing the calibration procedure.
4. Enter the location of the calibration procedure.
5. Enter the date of the calibration procedure.
6. Place the Transducer Block Mode in Manual and verify that the travel properly tracks the setpoint changes.
To Next Page
Loading...
Need help?
General
