Y to use 4 to 20ma instead of 0-10v

Answer Posted / ravinder

Because Voltage drops as resistance of cable conductor
increases but current will be same at any point of the
loop.4mA is called Live Zero,shows liveliness of the loop
when process variable is zero.

Is This Answer Correct ?    27 Yes 4 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is stripper & spilitter ? Diffrence in this.?

2150


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

2356


what is the field bus calble ? what are diffrences in orang colur cable and black coular calble ?

2588


how can i check vortex shedder bar it is ok? if there is ohms condition are shown correct?

1851


Q- Control problem are mainly classified in _____ types. a-)4 b-)3 c-)6 d-)nono of these Few of them i know is 1- regulator type problem (eg- Air conditioner) 2- tracking problem (eg missile trcking problem) 3- sybernatics 4- optimal control problem

1820






how works encoder in plc

1694


i am from instrument branch i want paper patern of mahagenco . any pevious years paper regarding my branch send me please . please.....

1730


sir i m preparing for BARC but i am not getting any papers to prepare for this exam so please send me some sample papers to my i.d for the preparation of barc.

2091


why any measurement made interms of pressure is more accurate ? to be more precise most of the flow velocity is made interms of pressure and it is accurate. what is the reason behind pressure measurement being accurate ?

1519


what should he know if he is an assitent engineer instrumentation in cement industries of experience of 10 - 15 year.

1730


what is the difference between Cv and air consumption? why the customer needs Air consumption details?

1619


send me model hpcl questions pleas..........my mail id mohideen.dharvesh@gmail.com

1862


A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.

1797


What do you know about gail?

2142


What is difference between radial vibration and axial vibration explain in detail .

1298