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6.2
Adjusting the control stage setpoint
Requirements
Adjusting the control
stage setpoint
HON 512 with HON 650 pilot user manual
Make sure that the following requirements are met:
▪ The load limiting stage is preset to a default value for the loading pressure (usually
5 - 10 bar over the setpoint for outlet pressure p
▪ The inlet and outlet shut-off devices for the gas regulating line section with the gas
pressure regulator are closed.
▪ The pressure in the outlet chamber downstream of the gas pressure regulator is lower
than the setpoint for outlet pressure p
▪ The shut-off devices for the blowdown lines are closed.
▪ The inlet pressure is present upstream of the inlet shut-off device.
Proceed as follows:
Figure
Adjusting the settings of the device
).
d
.
d
Step
Description
1
Unscrew the lock nut (1) on the set screw
(2) located on the underside of the pilot's
control stage.
2
Loosen the set screw (2) until the tension
in the pilot spring has been relieved.
3
Open the inlet shut-off device.
4
Turn the set screw in small increments until
the pressure gauge in the outlet chamber
shows the setpoint for the correct outlet
pressure p
.
d
Turn the set screw:
▪ Clockwise (+) to tighten the pilot spring
or
▪ Counterclockwise (-) to loosen the pilot
spring
5
Open the outlet shut-off device.
57
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