EB 8484-1 EN
8-3
Operation
8.3 Performing zero calibration
Risk of personal injury due to moving parts on the valve.
Î
During zero calibration, do not insert hands or fingers into the valve yoke and do not
touch any moving valve parts.
Î
Do not block the actuator stem.
In case of inconsistencies in the closing position of the valve, e.g. with soft-seated plugs, it
might be necessary to recalibrate zero over Code
P23
.
Start zero calibration:
Î
Enable configuration (Code P2).
1. Turn
until Code
P23
appears.
2. Press
and hold for 3 s (reading:
3
...
2
...
1
).
Î
Zero calibration starts.
P23
and
ZERO
blink during the calibra-
tion procedure. The positioner moves the control valve to the
CLOSED position and recalibrates the internal electric zero point.
Î
When the zero calibration has been successfully completed, the
positioner changes to closed-loop operation.
Canceling zero calibration
Zero calibration can be canceled:
Cancel zero calibration:
1. During zero calibration, press . Code
P23
and
ESC
blink.
2. Press again. Zero calibration is canceled.
Î
The positioner changes to closed-loop operation without perform-
ing a zero calibration. A new zero calibration can be started di-
rectly afterwards.
WARNING
!
Содержание TROVIS 3730-1
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