how to explain PID?

2 Answers   Jindal,

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what is positive feedback and negative feedback?

2 Answers   CEPC,

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Is there is a device to convert mechanical energy to electrical energy

4 Answers  

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What is seeback effect?

3 Answers  

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What is transducer

4 Answers   IFFCO, Jindal,

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What is live zero and dead zero

2 Answers  

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What are the uses of orifice plates?

0 Answers  

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What is the SCAN time of a DCS/PLC? What is the typical value for scan time of DCS and PLC?

6 Answers   Essar, Gasco, Siemens,

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Why we use 3-15 psi air for control valve input?

2 Answers  

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HI, can anybody give details about GAS TREATMENT PLANT CONSTRUCTION,as INSTRUMENTATION ENGINEER what are the responsibilites.what are the instruments mainly instrumentation engineer will deal with

0 Answers   GSM, IOCL,

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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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What is deffrence between Battery and capacitor

3 Answers   Siemens,

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