Answer / monapaul

Also I WANT TO KNOW SOME BASIC CONCEPTS RELATED TO
INSTRUMENTATION in technical field

Answer / ravi prakash

Before knowing the concepts, one should know, what
instrumentation is.
In simple sense, instrumentation is art rather than a
science of taking measurements.
Now you can think of all the posible ways to measure a
physical parameter.

take example of measuring flow rate of any fluid.
the flow of fluid is proportional to the diffrential
pressure created when its flow is restricted, also the flow
is proportional to the amount of heat it can remove from a
hot source, or the change in frequency of ultasonic waves
made to pass in a flow, and also flow is proportional to
the voltage generated across electrodes when placed in a
magnetic field.... and the list goes on.

this was a small example to show that any fundamental can
be somehow related to a physical parameter, search for an
appropriate instrument compling in terms of cost, material
and technical specifications regarding the measureand.

The fundamental aim of instrumentation is to measure the
physical parameter and convert it into appropriate user
friendly form like digital readouts or graphical views.

And the book by B.G Liptak is Bible for instrumentation.

Answer / v.ramakrishna

Please buy B.G.Liptek book volume - 1 and volume - 2 which
covers both measurement and control.

AS Instrumentation is a concept of measurement + Control.

How you measure and how you control the parameters is the
concept of instrumentation.

You can get the books from Mumbai, If you have any source
try to get it.

Answer / jose

14.7 psia = 0 psig
27.7 in H2O = 1 psig

Where are use of pressure,level,flow switches?and what is input and output

3 Answers  

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What is cut off relay? And why use in PLC and DCS?

0 Answers  

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If a flow transmitter (magnetic type FT) that can measure flow and temperature, then why in some industries people use flow transmitter and temperature transmitter in the same line 1 after another? Even after 1 single flow FT is capable of measuring flow as well as temperature.

1 Answers   Process Control Technologies,

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where proximity sensor installed on tank in loading arm application

0 Answers   Kalpena Industries,

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What is a flow meter?

2 Answers  

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How will you calibrate an Absolute Pr.Transmitter of range 400mmHg absolute ?

0 Answers   CCIE,

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Hi buddies! my name is sachin and i am working as a electrical and instrumentation engineer in a paper plant. right now i am facing a problem and if someone could help me it will be an immense pleasure to me. i am using AC 800M to synchronise DCS500 drives on paper machine and rewinder.communication is on PROFIBUS and we are using NPBA-01 module to link profibus to DC drives.But these days two of these drives are showing a error named FIELDBUS COMM.TIMED OUT and the drives get tripped.I have changed the NPBA module and PROFIBUS cable.So if anyone can do please help me out with this problem.I'll be highly grateful.

0 Answers  

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How would i calibrate a new commissioned flow transmitter???

3 Answers  

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In your own words, would you expect an ultrasonic level device to work better in a pressure vessel with a high pressure or a strong vacuum, and why?

1 Answers  

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How to make position transmitter feedback reverse i.e at valve close i want 20ma output and at full open 4ma.for the NELES positioner,model:ND8261/TS1.

3 Answers  

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in a electronic controller why we are using 250 ohm resistance in input signal?is i/p is necessary in control valve when we are using electronic controller give details?

3 Answers   IOCL,

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HOW DPT WORKS?

6 Answers   Essar,

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