Operating instructions

Commissioning
9.4 Copying the initialization data when replacing a positioner
SIPART PS2 with and without HART communications
Operating Instructions, 09/2008, A5E00074631-08
133
Copying the initialization data
Copy the initialization data and the device parameters as follows:
1. Read in the initialization data and the device parameters of the positioner to be replaced.
Use a suitable parameterization tool for this purpose.
2. Save the data in the parameterization tool.
Note
If the positioner to be replaced has already been initialized or configured using the
parameterization tool, you need not read in and save the device data.
Replacing the positioner
Proceed as follows to replace a positioner in a running system:
1. Fix the actuator at its current position mechanically or pneumatically.
2. Determine the actual position value.
– Read the actual position value on the digital display of the positioner to be replaced.
Note down the read value.
– If the electronic unit of the positioner is defective, measure the actual position value at
the actuator or the valve. Note down the measured value.
3. Dismantle the positioner.
4. Attach the lever arm of the positioner to be replaced to the replacement positioner.
5. Install the replacement positioner on the control valve.
6. Set the transmission ratio selector of the replacement positioner to the same position as
that of the positioner to be replaced.
7. Use the parameterization tool to transfer the saved device and initialization data to the
replacement positioner.
8. If the displayed actual position value differs from the noted value, correct the deviation by
moving the friction clutch.
9. The replacement positioner is ready for operation when the displayed and the noted
values match.