Answer / pavan wagh

At high pressure in pressurized vessel ultrasonic signal gets suppressed substantially ,same is the case with strong vacuum where medium (air) of signal transfer is absent.
In both cases DP transmitter is the best choice for good accuracy. For level measurement with DP transmitter density compensation is essential,as liquid (water) density changes at high pressure and high temperature.

generally for transmitter we are giving supply 24vlts?but we are getting output 4-20ma ? how it is possible? is there any operation inside the tx?pls give complete information?

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What is capacity of impulse line tube ...answer in psi

2 Answers   Shell,

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Explain the thermocouple and RTD?

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how to check the leak in thermowells

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use of split range ? where it is used ? in which control loop it is used ?

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any body who gone thru recent iocl interview.INSTRUMENTATION questions. I need.

0 Answers   IOCL,

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(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.

0 Answers   ADMA OPCO,

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Good Evening all.My question is - For a feed water line to an equipment if i need to measure the flow we will use orifice /magnetic/vortex depend on cost/spec.If i need to measure a ''Alarm''signal and ''Interlock'' from one point i think we can use orifice type in one location with 2 different tapping points - one for alarm and one for an interlock to flow valve..If in case i need to have both these signals(Alarm & interlock) from magnetic flow meter,is it possible??will 2 seperate sensors will be located inbuilt r we can program it ??..i thk we can have one transmitter with these 2 signals...need to know any technical issues are there?pls clarify

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what is intrument termination what is commisioning

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how to calculate density?

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What is the working principle of the magnetic meter?

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We are used ABB 800xa 5.1.please tell me how to instrall this.

1 Answers   TCCL,

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