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).
9.8
Electronic position transmitter RWG: set
— Option —
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 0 – 20 mA or 4 – 20 mA.
Table 7:
Technical data RWG 4020
3- or 4-wire system
Wiring
TP_ _4/ _ _ _
KMS
Terminal plan
0 – 20 mA, 4 – 20 mA
I
A
Output current
24 V DC, ±15 % smoothed
U
V
Power supply
24 mA at 20 mA output current
I
Max. current consump-
tion
600
Ω
R
B
Max. load
Figure 47:
View of control unit
[1]
Potentiometer (travel sensor)
[2]
Potentiometer min. (0/4 mA)
[3]
Potentiometer max. (20 mA)
[4]
Measuring point (+) 0/4 – 20 mA
[5]
Measuring point (–) 0/4 – 20 mA
1.
Connect voltage to electronic position transmitter.
2.
Move valve to end position CLOSED.
3.
Connect ammeter for 0 – 20 mA to measuring points [4 and 5].
4.
Turn potentiometer [1] clockwise to the stop.
5.
Turn potentiometer [1] slightly in opposite direction.
6.
Turn potentiometer [2] clockwise until output current starts to increase.
7.
Turn potentiometer [2] in opposite direction until the following value is reached:
-
for 0 – 20 mA approx. 0.1 mA
-
for 4 – 20 mA approx. 4.1 mA
➥
This ensures that the signal remains above the dead and live zero point.
8.
Move valve to end position OPEN.
9.
Set potentiometer [3] to end value 20 mA.
10. Approach end position CLOSED again and check minimum value (0.1 mA or
4.1 mA). If necessary, correct the setting.
38
SAExC 07.1 – SAExC 16.1/SARExC 07.1 – SARExC 16.1
Commissioning (basic settings)
AMExB 01.1
