Fisher easy-Drive 200L Instruction Manual page 15

Instruction Manual
D104331X012
Analog Input Calibration
For valves using 4-20 mA as a control source, several options are available to customize control of the actuator. Use a
4-20 mA signal generator to provide the desired signal. It is possible to calibrate the 4-20 mA signal in reverse acting or
split-ranging with the method below with at least 4 mA 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 4-20 Positioning or 4-20 mA Level, enter the Calibration screen and the 4-20 mA
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 4-20 mA 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 14. Fisher easy-Drive Configuration Software
5. Set the 4-20 mA signal to the desired value for when the valve is to be open.
6. Enter this value into the Commanded mA Signal text box and press Next
easy-Drive 200L
December 2018
15