10.
Commissioning (optional equipment settings)
10.1.
Potentiometer
The potentiometer is used as travel sensor and records the valve position.
Setting elements
The potentiometer is housed in the actuator switch compartment. The switch
compartment must be opened to perform any settings. Refer to <Switch compartment:
open>.
Setting is made via potentiometer [1].
Figure 88: View on control unit
[1]
Potentiometer
10.1.1.
Potentiometer: set
Information
Due to the ratio of the reduction gearing, the complete resistance range/stroke is not
always covered. Therefore, external adjustment (setting potentiometer) must be
provided.
1.
Move valve to end position CLOSED.
2.
Turn potentiometer [1] clockwise to the stop.
➥
End position CLOSED corresponds to 0 %
➥
End position OPEN corresponds to 100 %
3.
Turn potentiometer [1] slightly in opposite direction.
4.
Perform fine-tuning of the zero point at external setting potentiometer (for remote
indication).
10.2.
RWG electronic position transmitter
The electronic position transmitter RWG records the valve position. On the basis of
the actual position value measured by the potentiometer (travel sensor), it generates
a current signal between 4 – 20 mA.
Information
RWG 5020 Ex electronic position transmitter is designed as an intrinsically safe
electric circuit Ex ib according to IEC 60079-11.
Intrinsically safe electric circuit, risk of explosion!
Risk of death or serious injury.
→
Observe the applicable installation regulations relating to explosion protection
when connecting.
→
Do NOT lead cables via the connections of AUMA actuator controls.
72
SAEx 25.1 – SAEx 40.1 / SAREx 25.1 – SAREx 30.1
Commissioning (optional equipment settings)
ACExC 01.2
