Why we use 4 to 20 mA, (This is International Standard)
instaed of this can we use 4-16, or 4-24 or 3- 15 or any
other range
- 13 Answers
- 29944 Views
- ONGC, I also Faced
- E-Mail Answers
Answer Posted / abdus sattar mollah
ALL ANSWERS ARE WRONG.....
4-20 is a standard because transistor which is the basic building block of any transmitter has a linear output charecteristics in 4-20ma range.
| Is This Answer Correct ? | 4 Yes | 8 No |
Post New Answer View All Answers
What are de-saturators?
How hart protocol can be connected with control valves?
Please asked me How calculate DCS controller memory.
Describe the typical instrumentation used in monitoring the performance of a shell and tube heat exchanger.
we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.
TECHNICAL/ARTITUDE
How ejector(or)evactor air pump is working in thermal power plant?
Somebody tell me in what way i need to prepare for csio pgrpe(adv instrum eng)interview?what all the quest can i expect?
How can test or measure the probe and extension cable to identify if the problem at the probe or cable or at the driver it self? (pleast notify the measuring method)
Using your own examples solve a problem involving normal table. (experimental method and analysis)
send me model hpcl questions pleas..........my mail id mohideen.dharvesh@gmail.com
What is compensation for flow ? Why we use compensation ? What are the factors of different compensation ? We not use then what problems may happen ?
1.can you use SCADA instead of DCS,DCS instead SCADA 2.Difference between DCS and PLC,can their role be reversed i.e. role interchange 3.Difference between RTU and PLC
What is 3 element control system
Working principle of magnetic flow meter ......and calibration procedure of e+h magnetic flowmeter...
