Answer / adnan ramzan

PE> plant earth
IE> Instrument earth
ISE> intersicly safe earth

Answer / vimal vankar

actually PE AND IE BOTH ARE SAME ONLY THEY ARE NAMED DIFFERENTLY

in my plant 100% feedwater control v/v is air to close but due to instrument air fail,the valve opens but instead of drum level high its get tripped in low low drum level.the urv of level tx is 0 and lrv is -800.pls tell me the reason. for such behaviour.

1 Answers   Sirpur Paper Mill,

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i have height of stem drum level 1000mm.how i calculate the DP transmitter

2 Answers  

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suppose there is gas flow meter I want to know weather meter calibration is done at high pressure or low pressure? pls justify.

2 Answers   Siemens,

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Hi friends, from Aug 4th onwards iam getting spikes for analog inputs in our DCS for a period of 800ms. I throughly checked every thing, finally i found that the DI, DO's from MCC panels shields are terminated in the Signal Earth where Analog Input signals shields are terminated. Is there any problem with this type of termination?. i checked the induction voltage from MCC and getting around 25VAC, please suggest me in this concern. Our plant is 8months old only. DCS is Siemens Make Simatic PCS7, and the transmitters are Yokogawa make.

1 Answers  

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How to convert m3/hr in tonnes/hr

2 Answers  

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what is the difference between E/P positioner and I/P positioner in control valve , in which application the respective positioner are used in.

1 Answers   ABB,

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how to check thermocouple ,its working or not?

14 Answers   Coca Cola, Ford, Honeywell,

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in rotark mov in display err msg showing how to remove the error

1 Answers  

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How to Calibrate Coriolis Flow transmitter in field

0 Answers  

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What is principle of ultrasonic level transmitter?

3 Answers  

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Ohm’s law, kirchoff’s law, pascal’s law, Bernoulli’s therem,

1 Answers   CCIE, Emcure,

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Wht should be the ratio of natural frequency (Fn) to wake frequency (Fw) and wht if goes above the rato limit?

2 Answers  

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