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How can we check Zero of DP type Level Transmitter onside?
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Answer Posted / jayaram
1.close the both HP and LP rootvalves
2.open the both HP and LP drain valves to drain the service
completely.
3.Close the drain valves.
4.open the vent caps of both HP and LP leadlines near the
rootvalves.
5.fill the lead lines completely with water.
6.obviously LP side , more pressure acts and current goes
below 4mA. So elevate the Zero Potentiometer to 4 mA(this
is for analog standard dp transmitter).
7.first of all you have to calibrate the dp transmitter for
the required range, then only you can do this elevation
zero checking.
| Is This Answer Correct ? | 11 Yes | 8 No |
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