Azbil 100 Series - Adjustment Procedure When Using the SVP Attached to the Booster Relay

5-7
5-6. Adjustment procedure when using the SVP attached to the booster
relay
When using the device attached to the booster relay, please adjust using the following
procedure:
Normal
Please be sure to connect the air pipe between
the device and the booster relay.
Adjust the needle of the booster relay to control
the air ow.
* In the case of the IL100 type, from the highest
sensitivity state (the state where the needle is fully
closed), turn the needle counterclockwise 1.5 turns
and use the AVP in the state where the booster
sensitivity dropped.
When using another booster relays as well, please
decrease the sensitivity before using.
Shut down the input signal once,
then reduce the sensitivity again
by turning the booster needle
1/4 to 1/2 turns.
Occurrence of
valve hunting
In the event that you have
dynamic characteristic data
for reference
Shut down the input signal once then interrupt
the auto setup program. Then increase the input
signal and use the commsta to change the following:
· size of the actuator *1
· hysteresis *2
· dynamic characteristic data *3
Conrm the static and dynamic characteristics of
the positioner by testing ve points: 0%, 25%, 50%,
75%, and 100%.
Use commsta to change the following:
· actuator size *1
· hysteresis *2
· dynamic characteristic data *3
etc.
· Large overshoot
(or large undershoot)
· It takes a long time to stabilize
Satisfactory
Permanent valve hunting
Finish the adjustment.
*1: Change the actuator size parameter from 6 to 5, 5 to 4, etc. in decreasing numerical order.
*2: Change the hysteresis parameters in order from light to medium and medium to heavy.
*3: Reduce P, GP, reduce I, GI, increase D, GD,etc.
Begin Adjustment
Mount the device and the
booster relay on the control valve.
Adjust the sensitivity of
the booster relay
Execute auto setup program
State at the time of hysteresis
measurement
Dynamic characteristic test
Second change of dynamic
characteristics
Dynamic characteristics
End
Readjusting booster
relay sensitivity
Setting dynamic characteristics
manually