SITRANS P DS III/P410 (7MF4.33.. 7MF4.34.. 7MF4.35..)
32
A5E03434626-04, 05/2015
To commission the pressure transmitter for vapor, proceed as follows:
1.
Open both the shut-off valves
⑥
at the pressure tapping point.
2.
Open the stabilizing valve
②
.
3.
Wait until the steam in the differential pressure lines
⑤
and in the equalizing vessels
⑧
has condensed.
4.
Open the differential pressure valve
③
and the vent valve on the positive side of the pressure transmitter
①
slightly,
until air-free condensate escapes.
5.
Close the vent valve.
6.
Open the vent valve on the negative side of the pressure transmitter
①
slightly, until condensate escapes without
bubbles.
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 ½ turn.
11.
Check and correct, if necessary, the zero point (4 mA) when the start of scale value is 0 kPa.
The 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.
6
Servicing and maintenance
6.1
Basic safety instructions
WARNING
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.
WARNING
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
accessory or spare part.
WARNING
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).
