SITRANS P DS III (7MF4.33.. 7MF4.34.. 7MF4.35..)
A5E03434626-03, 06/2013
29
Danger of poisoning when the device is vented.
If toxic process media are measured with this device, toxic liquids can escape when the device is vented.
Before venting, make sure there is no liquid in the device or take the necessary safety precautions.
To commission the transmitter with liquids, proceed as follows:
1. Open both the shut-off valves
⑥ at the pressure tapping point.
2. Open the stabilizing valve
②.
3. With
transmitters below the differential pressure transducer
, open both blowout valves ⑦ one after the other until the air-
free liquid escapes.
In the case of a
transmitter above the differential pressure transducer
, open both vent valves ⑩ one after the other until
the air-free liquid escapes.
4. Close both drain valves
⑦ or vent valves ⑩.
5. Open the differential pressure valve ③ and the vent valve on the positive side of the transmitter ① slightly, until air-free
liquid escapes.
6. Close the vent valve.
7. Open the vent valve on the negative side of the transmitter
① slightly, until air-free liquid escapes.
8. Close the differential pressure valve
③.
9. Open the differential pressure valve
④ until the liquid emerges and then close it.
10. Close the vent valve on the negative side of the transmitter ①.
11. Open the differential pressure valve
③ by rotating it in half a turn.
12. Check and if required adjust the zero point (4 mA) if the start of scale value is 0 bar.
13. Close the stabilizing valve
②.
14. Open the differential pressure valves (
③ and ④) completely.
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