canu tell me why 4-20 ma and why not this 3-25ma?please
give reason of this value.

Answer Posted / karthik

The Electronic circuits employed in all Instruments require
atleast 3 mA for its actuation so the lowest range is
limited to 4mA & the rest as said by JOSE is exactly correct

Is This Answer Correct ?    1 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

what is the electrical operation procedure for switching on 27.6MVA electric furnace.

1609


Type of level transmitter commnly used in Procees area are the following. a.________________This type of level transmitter works as follows

1656


how to calculate the total flow in square root

1754


How to calibrate smoke Dectector

1132


how to calibrate mass flow meter (Coriolis)? Example calibration range: 0 to 2500 kg/hr line size 3" fluid: Etheline glycol (MEG)

2260






give me all the details about the interview and which type of question being asked

1808


hello sir/madam, I,Subramanian need 5yrs placement papers of officer trainee of Instrumentation technology.pls send to this mail id mani_nxtgen@yahoo.co.in please do the needful. with regards, subramanian.v

1773


installation process of orifice,a question asked for confusion creation in interview by BARC 1.if orifice is tightly fitted with pipe ,it will act like venturi 2.if orifice is left hanging in between liquid it will not create the pressure difference exactly,

1676


How is automatic reference junction compensation carried out in temperature recorders?

649


Instrument QA/Qc what is the project quality plan?conduit inspection RFI. which documents attache with package?

10408


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

1491


Which is your favourite subject & explain any one topic of it.

9005


Which are all the commonly used Bordon tubes in the pressure gauges. Do any one use ASTM A 312 tubes for this purpose?

1327


hiii.... can any one provide me previous years question paper of hindustan petroleum for instrumentation engineering???

1536


What is super thermocoupal?

1703