Woodward TG-10E, Installation And Operation Manual

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Manual 04045 TG-10E/-13E/-17E Actuator
Woodward 17
16. Recalibrate the TG actuator after completing the above procedure. See
below: Procedure with Actuator on the Turbine OR Calibration Procedure
with Actuator on a Test Stand.
Calibration Procedure
There are several conditions which require a recalibration of the TG actuator:
•
When the installation is changed from vertical to horizontal, or vice versa.
•
After performing a transducer assembly tightness check, disassembly, and
rework.
•
After cleaning the pilot-valve orifice plunger.
•
Any time a calibration shift is suspected.
Calibration Procedure with Actuator on the Turbine
1. CLOSE THE HAND-THROTTLE STEAM VALVE, following the turbine
manufacturer’s instructions.
WARNING—OVERSPEED
When operating the hand-throttle, the system is not under actuator control,
and extreme caution must be taken to prevent overspeed. Do not attempt if
the overspeed device is not functioning.
2. Disconnect the actuator from the steam control valve linkage.
3. Remove the actuator electrical connection.
4. Manually rotate the actuator terminal shaft to its full minimum position and
mark that position with a reference mark.
WARNING—START-UP
Be prepared to make an emergency shutdown when starting the engine,
turbine, or other type of prime mover, to protect against runaway or
overspeed with possible personal injury, loss of life, or property damage.
5. Following the turbine manufacturer’s instructions, carefully start the turbine
manually using the hand-throttle steam valve, and set the speed at the
following speed setting:
1500 rpm on actuators marked 2400 rpm
2400 rpm on actuators marked 4000 rpm
4000 rpm on actuators marked 6000 rpm
6. Apply a 0 to 200 mA power source to pins A and B of the connector to check
the level adjustment on the actuator (see Figure 4-2).