Fisher easy-Drive 200L Instruction Manual page 14

easy-Drive 200L
December 2018
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.
Note
Should actual travel not equal the expected travel you will receive a span calibration failure alert. See figure 13. Ensure valve type is
selected correctly. It may be necessary to re-couple the valve actuator assembly.
Figure 13. Fisher easy-Drive Configuration Software
Span Calibration without the use of Modbus
1. Turn power to the actuator off.
2. Wait for 10 seconds to ensure all circuits have discharged.
3. Return power to the actuator and use the appropriate calibration method for your control signal. Calibration
sequence must be done within 15 seconds of power being switched on.
4. For positioning operation using 4­20 mA:
a. Apply a 20 mA signal between pins 4-20 mA - and 4-20 mA + – valve plug will not move at this time.
b. Apply a 4 mA signal between pins 4-20 mA - and 4-20 mA + – valve plug will move to the upper stop,
immediately followed by moving to the lower, closed position.
c. If calibration of the analog input is desired to improve positional accuracy, an optional operation is listed in the
next section titled Analog Input Calibration.
5. For On/Off operation using dual­input dry contact:
a. Close the contact to create a short between pins COMMON and OPEN – valve plug will not move at this time.
b. Close the contact to create a short between pins COMMON and CLOSE – valve plug will move to the upper, open
position and then to the lower, closed position.
6. For On/Off operation using single dry contact:
a. Close the contact to create a short between pins COMMON and OPEN – valve plug will not move at this time.
b. Open the contact to create an open circuit between pins COMMON and OPEN – valve plug will move to the
upper, open position and then to the lower, closed position.
7. The unit is now calibrated.
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Instruction Manual
D104331X012