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Question { Exxon Mobil, 53530 }
WHICH INSTRUMENT USED TO CALIBRATE CONTROL VALVE?
Answer
Meter .mA Souce apply for I/P Converter so Opening Closed
for Control Valve .At the opening closed time measured for
position note.Supposed opening for Valve positioner 50% ma
13.5 So adjust the Zero or Span Calibration to Control the
ositioner
Chart
% Actual Value Error Zero/Span
0 4.7mA 0.7 4mA
25 8.5mA 0.5 8mA
50 12.0mA 0.0 12mA
75 16.4mA 0.4 16mA
100 20.5mA 0.5 20mA
| Is This Answer Correct ? | 81 Yes | 8 No |
