Answer / biswarup das

T/c is connected in parallel(not always though)as its emf
remain same doesn't matter how mant t/c is connected in
parallel only(note this is not applicable in series connection)

one purpose is the measurement of average temperature
between several locations. The easiest way to do this is to
connect several thermocouples in parallel with each other.
The milli volt signal produced by each thermocouple will
average out at the parallel junction point. The voltage
differences between the junctions drop along the resistances
of the thermocouple wires.

Answer / u.nathan

bcoz output is voltage

pls tell me whethere flame proof HMI's are available or every HMI is manufactured by considering flame proof standard.

3 Answers  

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can we use a control valve without positioner

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To find closed tank level by DP transmitter , how to findout its range.and insomeplace they using range like - 1500 to +1500 mmwc why not 0 to 3000 mmwc. how they spilit they range for minus and plus.and why?

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How to work ultrasonic flow meter ?

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how to work static pressure sensore how to work dpt

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Can you tell me how we will select RTD and Thermocouples for Temperature applications. I.e How we will choose accurate one for a specefic operation if both having same ranges

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what do you mean by CJC (cold junction compensation).?

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Close loop and open loop diagram for instrumentation

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what is the difference between plant earth and instrument earth? and what type of cable( cable size ) used for both? and why ?

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I want to use 1/2 inch SS316 tube in my high pressure & temperature (64 kg/cm2 & 500 deg C)after condensate pot in pressure tranmistter. 1) Is it possible to use 1/2" ss316 tube in high pressure and temperature line. Tube manufacturer is local vendor. 2)On sarting the plant, We need to do system fluse that time condesate is not in the condesate pot so steam is directly contact with the tube. We have no exact calculation to know our tube is ok or nor at this time. pleae,reply.

1 Answers  

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