Answer / mpf

You probably mean on explosion hazard zones. Most of
instrumentation equipment falls in the category of intrinsic
safety ("i") and therefore can be placed in all zones (with
some limitations to zone 0) being zone 0 the most strict zone
where exploding substance is always present and zone 2 - the
least strict zone where the potentialy exploding substance
could be present in short periods of time in case of an
failure. Otherwise, if the equipment is not of "i" type of
protection, other rules apply.

How to zero trim the level transmitter by using foundation fieldbus communicator.

2 Answers   Emerson,

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1.what is controller proportional gain 2.what is the controller intergral action time. 3.A proportional plus derivative controller that has a proportional band of 20% and a derivative action time of 0.1 minutes. Construct the shape of the output waveform for the triangular input if the input rises and falls at the rate of 4 units per minute.

0 Answers  

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What is mean by trim?

5 Answers  

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what is the field bus calble ? what are diffrences in orang colur cable and black coular calble ?

0 Answers   ABB, Yokogawa,

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what is orfics working in main steam line. is it increase pressure, velocity of steam flow and dicrease steam flow rate. or any other

0 Answers  

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what is the difference between single and double compression cable gland

3 Answers   Petrofac,

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what are the sensor types of vibration&speed?n what is proximity sensor?

3 Answers  

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I want to install analog type, flange mounted gas flow meter (line size - 2"), for CNG flow measurement.Kindly give some details of flowmeter or suppler name, available in India.

1 Answers  

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what is the difference between scaler and vector drive

0 Answers   Jindal,

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what is commissioning.

2 Answers   Takreer,

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what is hot loop check and cold loop check.

3 Answers   Bapco Bahrain Petroleum Company,

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Why 4-20 amps is being used in instruments? Why cant we use any other range instead of 4-20 amps? Why only 4 amps is taken as lower limit and why 20 amps is taken as the higher limit?

0 Answers  

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