10.2 Cleaning
The positioner is maintenance-free to a large extent. Screens are installed in the pneumatic
connections of the positioners to protect them from rough dirt particles. If there are dirt particles
in the supply air (PZ), they damage the screens and hamper the function of the positioner.
Clean the screens as described in the following two chapters.
10.2.1 Positioners 6DR5..0, 6DR5..3 and 6DR5..5
Procedure for removal and cleaning of the screens
1. Switch off the supply pressure PZ.
2. Remove the pneumatic pipelines.
3. Unscrew the cover of the 6DR5..0 or 6DR5..3 enclosure.
4. Remove the three screws on the pneumatic terminal strip.
5. Remove the screens and O-rings behind the terminal strip.
6. Clean the screens, e.g. using compressed air.
Procedure for installation of the screens
CAUTION
Damage to the polycarbonate enclosure 6DR5..0
● The enclosure is damaged due to screwing in the self-tapping screws improperly.
● Ensure that the available thread pitches are used.
● Turn the screws anticlockwise until they engage noticeably in the thread pitch.
● Tighten the self-tapping screws only after they have engaged.
1. Insert the screens into the recesses of the enclosure.
2. Place the O-rings on the screens.
3. Insert the pneumatic terminal strip.
4. Tighten the three screws. Note: With the polycarbonate enclosure, the screws are self-
tapping.
5. Place the cover and tighten it.
6. Connect the pneumatic pipelines again.
Service and maintenance
10.2 Cleaning
SIPART PS2 with 4 to 20 mA/HART
198 Operating Instructions, 11/2019, A5E00074631-AE
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