Interested to Buy Any Domain ? << Click Here >> for more details...
In 2 wire transmitter 1 wire is used for power and other is
used for signal( 4-20)ma
In 4 wire transmitter 2 wires are used for power and 2 wires
are used for signal (4-20)ma .
but my question is "what is the criteria or parameters we
have to consider while selecting these transmitters for eg(
distance, safety zones etc.
- 1 Answers
- 5436 Views
- I also Faced
- E-Mail Answers
Answer Posted / omer baosman
A 2 wire xmitter is powered by the mother instrument. The
output signal(4-20ma) is returned on the same wires that
powers it. the main purpose of this design is to reduce
wiring cost, standrdisation of circuits, and above all, to
kep all the transmitters at same ground potential.
A 4 wire inst. has design flexibility to utilize any power
like, 230vac, 24 vdc or 110 vac. It can feed the signal to
any mother instrument. Wherever the basic sensor of an
instrment needs power other than 24 vdc (like chemical
analyser) u have no choice but to use a 4 wire xmitter.
| Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
How d.p. Transmitter can be applied to close tank?
how can we tune a PID. If it is by zeiger nichols method..please explain briefly with help of an example.
Any one can help me to identified, how can we interchange the device in FF
Reason for capillary type dp level transmitter fluctuation
1.what is the effect of vapour presuure in orifice plate flow measurement 2.which is more effective 2 pressure sensors or one single differential pressure sensor in orifice plate measurement 3.how to design a v/i converter and i/v converter 4.how many type of thermocouple are there 5.how many leads are there in thermocouple measurement 6.how pressure sensors are connected in level measurement in differential pressure method 7.what is the output of capacitive pressure sensor (ac or dc),how its o/p is signal charactarized 8.what is the physical meaning of discharge coeeficient,why it is calculated,orifice plate what is its value,why it is less than 1,Q at upstream is equal to or not equal to Q at downstream of orifice plate why?what is vena contracta in orifice plate 9.why rotameter is called variable area flowmeter,it can measure flow even if area is not varying,why it is made tapered 10.design a 10 bit counter ,which counter you will prefer 11.how to remove self heating error in RTD 12.which is more sensitive pt100 or pt50 13.why thermocouple are connected in parallel 14.what is lead contact error in RTD,how to avoid 15.what is P,PI,PID,PD controller,why there is no ID controller 16.what is override,split range,sequential,ratio,feedforward,cascade controller 17.why we moved from SR to JK and then JK to master slave JK flipflop,give correct reason 18.how to measure level of a closed container which contains vapour and liquid,remember no vapour gas should be leaked,so ultrasonic and capacitive is not an option,design another method 19.how to design horse race counter including sensors and signal conditioning element 20.what is bevelling
what are the diff. in servo and regulatory control?
how can be calibrate flow indication transmitter (rosemount) it shows excess milli amps nearly about 24 ma on full scale, but its scale was set on 20ma on full scale..???how can be simiulate..???
Explain pH, Conductivity.
How can i copy program (parameter) from mm440 (V.F.D.) by using BOP?
What is wet leg condition and why is it used?
How can i test procedure grounding for CAT-7 cable? Or How can we test procedure CAT-7 Cable Electrically safe?
Hi i m B.E. In elect. & comm. I m workin in bio mass plant from 6 mnths as inst. Engg. but now i m in dept. Of operation as shift engg...which is best operation or inst. 4 me? M confusd..plz help and reply me..
Define the difference between a stable versus an unstable controlled system and some of the tools you might use to be able to detect when this is happening and assumptions used for control system application design that could contribute to instability
what is the protection system in solar turbine compressor
what is the diffrence between pressure safety valve & pressure relief valve....pls
