Samson 373 Series User Manual

EB 8384-2 EN 111
Operating the positioner
7.7 Zero calibration
In case of inconsistencies in the closed position of the valve, e.g. with soft-seated plugs, it
might be necessary to recalibrate zero.
Risk of injury due to the actuator stem extending or retracting.
Do not touch or block the actuator stem.
The process is disturbed by the movement of the actuator stem.
Do not perform zero calibration while the process is running. First isolate the plant by closing
the shut-off valves.
The positioner must be connected to the supply air to perform the zero calibration.
Enable conguration:
Ifnosettingsareenteredwithin120seconds,theenabledcongurationfunctionbecomesin-
valid.
1. Turn untilCode3appears(reading:
No).
2. Press , the code number 3 blinks.
3. Turn
until YES appears.
4. Press
toconrm(reading: ).
Enableconguration
Default: No
Perform zero calibration:
1. Turn untilCode6appears.
2. Press
, the code number 6 blinks.
3. Turn
until ZP appears.
Î Press INIT key.
Zero calibration starts. The positioner
moves the valve to the CLOSED position
and recalibrates the internal electrical zero
point.
Init mode
Default: MAX
WARNING
!
NOTICE
!

Samson 373 Series Specifications

General

Brand	Samson
Model	373 Series
Category	Valve Positioners
Language	English