in a electronic controller why we are using 250 ohm
resistance in input signal?is i/p is necessary in control
valve when we are using electronic controller give details?
- 3 Answers
- 8714 Views
- IOCL, I also Faced
- E-Mail Answers
Answer Posted / rohit
A electronics controller needs 4-20mA current and we have
230v or more voltage in industry so to maintain flow of
current 250 ohm resistance is vital.
I=V/R
| Is This Answer Correct ? | 2 Yes | 16 No |
Post New Answer View All Answers
please send data bank of quetions answers on analytical instrumentation.
which type of signal used in instrument?
CONTROL VALVE OPERATING IN MANUAL BUT NOT IN MANUAL. WHAT SHOULD BE THE PROBLEM ?
what is the vital subject for scoring bhel exam&what is the question pattern
Explain about the leakage class of the control valves
all questions related to instrument technician in any offshore oil and gas company.
State some of balance principle’ advantages?
How to calibrate displacer type level transmitter (chemtrol make )for level measurement in hotwell , LP & HP heater ?
how to tune siemens sipart electro pneumatic positioner..plz tel me..
Draw block digram for well head from well to shipping pump?
What is first echo & echo window in radar type level transmitter?
In which principles tx ,pressure gauge,Temp gauge,control valve works?
Draw symbols of the following :
how many types of spped sensors n vibration sensors?their basic principle n connection?
What is force balance principle? State some of its’ advantages.
