Set Measuring Range - AUMA SAEx 25.1 Operation Instructions Manual

Commissioning (optional equipment settings)
Setting elements The RWG is housed in the actuator switch compartment. The switch compartment

11.2.1 Set measuring range

1) Power supply via external, intrinsically safe (Ex ia or Ex ib) power supply unit with type test certificate meeting the technical requirements
of RWG 5020 Ex.
2) For heater in switch compartment
3) Ambient temperature depends on the temperature range of the actuator: refer to name plate
40
Data
1)
Power supply U
V
1)
Short-circuit curren t I
K
1)
Power P
Max. load R
B
Impact of power supply
Load influence
Temperature impact
Transmitter potentiometer
Ambient temperature
Explosion protection
EC type test certificate
must be opened to perform any settings. Refer to Open switch compartment.
Setting is made via three potentiometers [1], [2] and [3].
Figure 45: View on control unit when switch compartment is open
[2]
[1]
[4]
[1] Potentiometer (travel sensor)
[3] Potentiometer max. (20 mA)
The output current (measuring range 0 – 20 mA) can be checked at the measuring
points [4].
For setting, voltage must be applied at the position transmitter.
1. Move valve to end position CLOSED.
2. Connect measuring equipment for 0 – 20 mA to the measuring points [4]. If no
value can be measured:
à Check whether external load is connected to customer connection XK (for
standard wiring: terminals 23/24). Consider maximum load R
à Or connect link across XK customer connection (for standard wiring: terminals
23/24).
3. Turn potentiometer [1] clockwise to the stop.
4. Turn potentiometer [1] slightly in opposite direction.
5. Turn potentiometer [2] clockwise until output current starts to increase.
6. Turn back potentiometer [2] until a value of approx. 4.1 mA is reached.
ð This ensures that the signal remains above the dead and live zero point.
7. Move valve to end position OPEN.
2-wire system
10 – 28.5 V DC
< 200 mA
< 0.9 W
(U – 10 V)/20 mA
V
≤ 0.1 %
≤ 0.1 % (R = 0...600 Ω)
B
< 0.1 ‰/K
5 kΩ
2) 3)
– 60 °C /–40 °C to +60 °C
II2G Ex ib IIC T4
PTB 03 ATEX 2176
[3]
[2] Potentiometer min. (4 mA)
[4] Measuring points 4 – 20 mA
.
B