Instruction Manual
D104161X012
D3 Valve with Gen 2 easy-Drive Actuator
February 2021
13
If an easy-Drive valve has been shipped from the Fisher factory, it is not necessary to perform a span calibration. If,
however, the valve has a new controller board or maintenance has been performed on the valve, such as trim
replacement, it will be necessary to perform a span calibration. A span calibration is accomplished by the following
method:
1. Ensure the process and valve are in a safe state – the valve may move during this operation
2. Press the CALIBRATE SPAN button to initiate the span calibration. The software will show a progress bar during the
calibration and display Valve Span Calibrated when complete.
Analog Input Calibration
For valves using 4-20mA as a control source, several options are available to customize control of the actuator. Use a
4-20mA signal generator to provide the desired signal. It is possible to calibrate the 4-20mA signal in reverse acting or
split-ranging with the method below with at least 4mA of signal difference between the close and open values. The
example shows a valve being changed from normal to reverse acting during the calibration process.
1. With the Control Method set to 4-20mA Positioning or 4-20mA Level, enter the Calibration screen and the 4-20mA
Signal Calibration window will be visible.
2. Click the CALIBRATE CLOSE & OPEN VALUES button. A separate window will open to guide through the process.
3. Set the 4-20mA signal to the desired value for when the valve is to be closed.
4. Enter this value into the Calibrated mA Signal text box and press Next
Figure 12.
5. Set the 4-20mA signal to the desired value for when the valve is to be open.
6. Enter this value into the Calibrated mA Signal text box and press Next
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