Answer / carl_ellis

Cold junction (CJ) or ice point compensation is the temperature measurement of the terminal connection temperature.  The difference between the CJ measurement and the freezing point of water is added to the thermocouple's gradient temperature measurement.

Cold junction can be measured by thermistor, RTD, or solid state junction.  

Answer / muhammad

compensation means additional of specific materials where extra length  of wire is run from the instrument.it connected with parallel effective resistance decrease and helpful to calculate higher range.

for what purpose strain guage is used?

5 Answers  

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what different types of problems do occur while doing instrumentation commisioning and how to solve them? please explain in detail

0 Answers   Process Control Technologies,

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i want to measure temp of hot sand(welding flux) in closed chamber(around 150 deg C).Which is better thermocouple or thermometer?

1 Answers  

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generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

1 Answers   Indian Steel,

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hi i want sov loop cheak from consol to field the operater given status to sov still no change, but MR room to sov ok so whats a problem and alreasy cheak all conection ok ?

2 Answers  

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What pressure results for a flow transmitter of range 0- 180t/h in the dcs and 0-301mbar in the field using square root extraction. Kindly also suggest formulae for the percentages 0,25,50,75,100?

0 Answers   Kentz,

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What is Fieldbus?

3 Answers   NSL,

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How does a strain gauge measure pressure?

2 Answers  

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Level in tank under vacuum (Ex: Condensate Tank of Power Plant)is measured using D. P. type level transmitter. Tank is subjected to vacuum of 755mmHg. Is it possible to fill wet leg ( i.e. leg connected to top of vessel with low point of D. P. xmtr) with water?. Are there chances of water getting sucked under vacuum? if yes, what is the solution?

3 Answers  

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what is the principal of coriolis mass flowmeter

1 Answers  

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How can we calibrate the level interface for Fisher® FIELDVUE® DLC3000?if use water to calibrate and our liquid SG are 0.75 and 1 ,Displacer height=14" and How much should be set SG in trasmitter during calibrate,for URV and LRV how shold be set

1 Answers  

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how can loop single 4-20 ma to two isolation amplifier? i mean i have two isolation amplifier with 4-20 ma input and 1-5 v output.can i done series connection ?

1 Answers  

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