why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything
- 19 Answers
- 43014 Views
- Honeywell, TCS, TN, I also Faced
- E-Mail Answers
Answer Posted / subash
from field to control room we use lengthy cables.due to the
resistance of the cable may voltage drop occur.hence we
always choose 4-20 ma over a 0 to 10v....if we select 0-20
ma then we can'n distingush between faut condition and
minimum scale....hence we choose 4-20 ma....
| Is This Answer Correct ? | 4 Yes | 1 No |
Post New Answer View All Answers
What is ultrasonic flowmeter?
Explain operation of Haskel pump.
how to check earthing,what is minum ohms for proper earthing
plz tell me clearly about PID.."when v have to change I value,D value,GAIN??
What is difference between differential pressure & delta pressure?
hi,i am doing 3 year in electronic and instrumentation engineering. what type of aptitude questions will be asked in a core industries and how can i improve my skills in instrumentation?
ORP sensor working principle?
Positioner usage.
WHAT IS MEANT BY PROJECT MANAGEMENT STRATEGIES IN INSTRUMENTATION?
How the warning lamp of a charging-system is activated ?
How to Calibrate Coriolis Flow transmitter in field
In turbine, what does term CDP, NI, NH, HSSOC, means
please can any one tell me clearly about pid tuning i am confusing about this .how to tune pid easly?
How to Calibrate Temperature Switch in field
CONTROL VALVE OPERATING IN MANUAL BUT NOT IN MANUAL. WHAT SHOULD BE THE PROBLEM ?
