Answer / rameez_rz2000

1st of all we have to open the control valve 50% and then
the feed back link of positioner will came at 180 degree to
control vale and now we will adjust the screw

Answer / rk

think positioner is nothing but a control valve.installation of positioner is done by closing the valve,then it has flange which helps to b screwed with pipes.

suggest a sensor to measure rapidly varying temperature?

1 Answers  

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difference between span and range

3 Answers   IOCL,

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what are the types of a thermocouple

2 Answers  

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how we will install a positioner ?

2 Answers   Descon,

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Difference b/w SCADA & DCS

8 Answers   Siemens,

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Why the tapping connections are taking above for gas service and below for liquid service?

2 Answers   ADCO,

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why we use 0.2 to 1.0 kg/cm2 output in control valve

4 Answers   GNFC,

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WHAT IS INSTRUMENTATION?

17 Answers   ITC Infotech,

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a pressure transmitter with a range of 0 to 2500kpag has a specified accuracy of 0.5 % of span.It is to be calibrated using a comparison gauge to have an accuracy of 0.1% of span.The comparison gauge has a range of 0 to 3000kpag What is the accuracy ratio? is this ratio acceptable?

1 Answers  

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why we should maintain neutral earth voltage below 1V while calibration? why cant it be 1.2V or 2V

0 Answers   Hospira,

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one rtd sensor which is connected at middle of distillation column where actual temp. is 100deg but when we tight this sensor at thermowell end it goes down to 90 deg & when remove from the thermowell(but sensor end dipped in well) showing actual reading, what is reason?

3 Answers  

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difference between DCS @ SCADA system? and how can use in field

5 Answers   Marafiq,

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