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3.3.2 Starting operation
■ Introduction
This device and the control valve form a manipulator which is used in process control.
Always take adequate safety precautions when starting to operate the control valve using
this device.
Note
If an explosion-proof device model is used in a hazardous area, pay particular attention
to how well electrical wiring connections (adapters, blind caps, etc.), covers, and the like
are tightened down.
Confirm the following points before starting operation.
■ Confirmation procedures
The confirmation procedure is shown below.
Step Procedure
1 Confirm that the device is installed correctly. Confirm that no mechanical interference
results from the movement of the control valve.
2 Confirm that electrical wiring of the device has been performed correctly, and that the air
supply piping of the device has been performed correctly (and that there are no air leaks).
3 Confirm that the valve operates as configured according to the input signal. After the
above items have been completed, operation of the device and control valve can be
started.
3.3.3 Stopping operation
■ Stopping operation
The procedure for stopping operation is shown below.
Step Procedure
1 Stop operation of the process. (Move each valve to the air fail position.)
2 If travel transmission output is used, set the host system control mode to manual.
3 Turn off the input signal (power supply) to the device.
4
Turn off the air supply to the device.
Note
If the device is installed in an adverse environment, for example in a corrosive
atmosphere, we recommend not turning off the air supply, in order to prevent corrosive
gases from entering the device.
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