AMTROBOX EEx ia
AMTRONIC EEx ia
18
Angle sensor adjustment
’’N’’ mounting
’’M’’ mounting
Box
Box
Angle
sensor
Angle
sensor
The Box / Actuator assemblies are delivered for
“N” mounting
on the valve.
Any other mounting must be specified when ordering and requires a modification to
the position of the angle sensor.
If the actuator is designed for an
“M” mounting
, it is necessary to change the
position of the angle sensor in compliance with the opposite diagram.
To perform this operation, it is necessary to previously remove the cover and to disas-
semble the following in the given order:
-- the control solenoid valves (AMTRONIC EEx ia),
-- the pointer,
-- the securing plate with the position detectors,
-- the angle sensor attachment screw.
Now turn the angle sensor casing 90
°
and repeat the previous operations in reverse
order.
ED
ED
4--20 mA feed--back position adjustment
Zero
Gain
When the box is delivered with its actuator, the transmitter is preadjusted in workshop.
It is not necessary to re--adjust it before valve mounting on site.
Nevertheless, if you wish to re--adjust it after a maintenance operation, proceed as follows:
-- rRmove the cover of the box.
-- Remove the electric pilots (AMTRONIC EEx ia).
-- Remove the supporting plate of the position detectors to access to the transmitter.
-- Two adjustments are available for the zero adjustment (4 mA) and the gain (20 mA).
-- Repeat the previous operations in reverse order.
Zero adjustment (4 mA) :
5 %
Gain adjustment (20 mA) :
10 %
Accuracy :
1 % of full scale
