Interested to Buy Any Domain ? << Click Here >> for more details...
why do we use 4-20 ma current why cant o-20ma
- 6 Answers
- 21785 Views
- Southwest Cheese, I also Faced
- E-Mail Answers
Answer Posted / dean hardage
The use of a current loop is to allow operation of the
intrument over a relatively long distance. The use of 4-20
milliaps make possible the use of a 'live' zero and
provides for an indication of a wire break. It also allows
for loop powered instruments to function. At zero current,
the electronics of a loop powered transmitter would not
work and the sensor would be effectively dead.
| Is This Answer Correct ? | 7 Yes | 3 No |
Post New Answer View All Answers
i have been asked by QAFCO to appear for interview for thy post of Instrument Designer(INTOOLS)..i m engineering graduate with 5 years exp. in design engineering.Will this job profile suit me??i need all ur help n suggestions for thy same?
Draw symbols of the following :
In control valve proximity inductive sensor is taken as digital feedback for full open and full close.Normally its volts 24v when the sensor acts the feed back voltage 14v so that our relay not indicating in plc panel . kindly give the solution.
what does the ratio 800-400-300-200/1-1-1-1-1 in the specification of current transformer indicates?
Can Any body tell me about the Contact or Email id of any good Consultancy which help me to find a job in Instrumentation Field in India .I have Six years of Work Experience in the Same field.Please revert me back on shammi_gwalior@yahoo.com ?
I will attend an interview with GasGas company for a position of Instrument Technician ( Offshore )in next month can anyone tell me what questions they will ask. Thanks in advance.
describe flow nozzel principle?
Programmable Logic control.
any questions on motor and energy conversions machines?
where are following valves are applicable to install. can any valve be installed any line. globe valve butterfly valve boll valve gate valve
What is exact difference between the panel earthing and system earthing in DCS system. What is the value of resistence.
what is function of sensor, and how is it work , explain with difination
There are many type of control cable like pair,core,tried, What are defination each one
IN CONTROL VALVE SPECIFICATIONS GENERALLY TERM " DE- 200" ."DM -400"USED,, WHAT IS DE/ DM STANDS FOR?
Specify for Cables - Flame Retardant and Fire Resistant?
