WHY WE NOT USE 2-20mA,1-20mA,3-20mA or 10-50mA SIGNAL?
INSTEAD OF 4-20mA.
- 6 Answers
- 12065 Views
- Hindustan Unilever Limited, Yashmun Engineers, I also Faced
- E-Mail Answers
Answer Posted / mike betts
I am not sure why the range of 16mA i.e 20 - 4, but the 4mA
starting is so that you have a posative value of current for
all values that the loop current represents. This way, if
you have no current at all, the loop is open circuit for
some reason.
| Is This Answer Correct ? | 4 Yes | 9 No |
Post New Answer View All Answers
What is 3 element control system
What is wet leg condition and why is it used?
principle of dead weight tester ?
What is the working principle of the magnetic meter?
Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72
what is function of sensor, and how is it work , explain with difination
Actual using of tube bender to bend 2 opposite 90 deg at correct measurement center to center of tubing.
centrifugal compressor interlock? Tell me the parameter at which compressor will trip
what are the selections available in configuring a burnout protection of a controller? thanks
i want to find out iffco get test paper
How servomotor controls throttle valve of TURBINE?
what is the input of digital counter during the the calibration time?
Do you have reference list?
what is metal of piston ring
Which is the best field foundation bus. ( FF ) Yokogawa, Honeywell or others ?
