2. Connect ammeter for 0 – 20 mA to measuring points [4 and 5].
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 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.
7. Move valve to end position OPEN.
8. Set potentiometer [3] to end value 20 mA.
9. Approach end position CLOSED again and check minimum value (0.1 mA or
4.1 mA). If necessary, correct the setting.
Information
If the maximum value cannot be reached, the selection of the reduction gearing must
be checked.
10.4. Mechanical position indicator: set
1. Fit indicator disc onto shaft.
2. Move valve to end position CLOSED.
3.
Turn lower indicator disc until symbol (CLOSED) is in alignment with the
mark on the cover.
4. Move actuator to end position OPEN.
5.
Hold lower indicator disc in position and turn upper disc with symbol (OPEN)
until it is in alignment with the mark on the cover.
6. Move valve to end position CLOSED again.
7. Check settings:
If the symbol (CLOSED) is no longer in alignment with mark on the cover:
7.1 Repeat setting procedure.
7.2 Check whether the appropriate reduction gearing has been selected, if
required.
10.5. Switch compartment: close
✔
If options (e.g. potentiometer, position transmitter) are available: Only close switch
compartment once all optional equipment has been successfully set.
Danger of corrosion due to damage to paint finish!
→
Touch up damage to paint finish after work on the device.
1. Clean sealing faces of housing and cover.
2. Check whether O-ring [3] is in good condition, replace if damaged.
77
SA 25.1 – SA 48.1/SAR 25.1 – SAR 30.1
AC 01.2 Intrusive HART Commissioning (optional equipment settings)
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