Siemens SIPART Series - 11.2 Cleaning of the screens; 11.2.1 Positioner in macrolon enclosure

Service and maintenance
11.2 Cleaning of the screens
SIPART PS2 with and without HART
232 Operating Instructions, 10/2013, A5E00074631-11
WARNING
Dust layers above 5 mm
Danger of explosion in hazardous areas. Device may overheat du to dust build up.
• Remove any dust layers in excess of 5 mm.
Cleaning the enclosure
● Clean the outside of the enclosure and the display window using a cloth moistened with
water or a mild detergent.
● Do not use aggressive cleaning agents or solvents. Plastic components or painted
surfaces could be damaged.
11.2
Cleaning of the screens
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 pneumatic auxiliary power supply, they damage the screens and hamper the
function of the positioner. Clean the screens as described in the following two chapters.
11.2.1
Positioner in macrolon enclosure
DANGER
Risk of explosion due to electrostatic charge
Electrostatic charges develop when cleaning the positioner in the macrolon enclosure with
a dry cloth, for example.
It is imperative you avoid electrostatic charges in the hazardous environment.
Removal and cleaning of the screens
1. Disconnect the pneumatic auxiliary power supply.
2. Remove the lines.
3. Unscrew the cover.
4. Unscrew the three self-tapping 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.