SITRANS P DS III (7MF4.33.. 7MF4.34.. 7MF4.35..)
A5E03434626-03, 06/2013
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4. Open the differential pressure valve ③ and the vent valve on the positive side of the transmitter ① slightly, until air-free
condensate escapes.
5. Close the vent valve.
6. Open the vent valve on the negative side of the transmitter
① slightly, until air-free condensate escapes.
7. Close the differential pressure valve ③.
8. Open the differential pressure valve
④ slightly, until condensate escapes without bubbles, then close it.
9. Close the vent valve on the negative side
①.
10. Open the differential pressure valve
③ by rotating it in half a turn.
11. Check and if necessary correct the zero point (4 mA) with a start of scale value of 0 bar.
The measuring result is only error-free if the differential pressure lines
⑤ have equally high condensate columns with the
same temperature. The zero calibration must be repeated if required if these conditions are fulfilled.
12. Close the stabilizing valve
②.
13. Fully open the differential pressure valves
③ and ④.
14. You can briefly open the drain valves
⑦ to clean the line.
15. Close the drain valve
⑦ before vapor escapes.
Servicing and maintenance
6.1
Basic safety instructions
Impermissible repair of explosion protected devices
Danger of explosion in areas subject to explosion hazard.
Repair must be carried out by Siemens authorized personnel only.
Impermissible accessories and spare parts
Danger of explosion in areas subject to explosion hazard.
● Only use original accessories or original spare parts.
● Observe all relevant installation and safety instructions described in the instructions for the device or enclosed with the
Maintenance during continued operation in a hazardous area
There is a danger of explosion when carrying out repairs and maintenance on the device in a hazardous area.
● Isolate the device from power.
- or -
Ensure that the atmosphere is explosion-free (hot work permit).
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