Interested to Buy Any Domain ? << Click Here >> for more details...
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
- 33455 Views
- ONGC, I also Faced
- E-Mail Answers
Answer Posted / nagarajan.p
First the question is why can't we use 3~15mA or other
range, here also we can check live zero and also we can go
step current like 3,6,9,12,15(i.e 0%,25%,50%,75%,100%).ok
The reason is the transmitter voltage is 24Vdc , here we
can load max of 600 ohms, for this voltage & load better
range is 4~20.
Why 4 ~ 20 is better since we can convert easily 1~5Vdc by
put 250 ohms.All the controllers and DCS , PLCs are operated
by the input of 1~5Vdc (external or Internal convertion)
| Is This Answer Correct ? | 47 Yes | 5 No |
Post New Answer View All Answers
How the sizing of the analog signal cable is calculate?
Im having problems with interfase betwen SPI v7.0 and SPPID v5.05. Previous versions of Intools shoul be fixed with SPPIDproj.ocx file. It was necessary to replace this file with one that allows the connection between different versions of SPPID. It is necessary in the current version to do the same?Thanks
what is The specifications for oriface instalation
what is diffrance between FF & SMART, explain with difination
What is modbus?
any body who gone thru recent iocl interview.INSTRUMENTATION questions. I need.
how to calculate signal cable sizing? and multipair cable sizing??explain in brief?
can u briefly explain aboutan aryton shunt multirange DC ammeter?
How to calibrate capillary type level transmitter
-/5A. What is the meaning and limitations of this in energy meter constant. It is a 3 phase LT Energy Meter. If this Energy Meter is connected through a CT of ratio 200/5 Amps, then what is the multiplying constant and how its will be calculated.
What is first echo & echo window in radar type level transmitter?
What is sensitivity in vibration probes..?
how to calibrate mass flow meter (Coriolis)? Example calibration range: 0 to 2500 kg/hr line size 3" fluid: Etheline glycol (MEG)
Describe a time when you anticipated potential problems and developed preventive measures.
If i have 4 Allen Bradely make RS logix 5000 PLC and for viewing that we are using 4 RS view SCADA for 4 different packages. Now, I will want to view two packages on only one SCADA. Then how i will do it?
