what is exat meaning of compentation in RTD ? what diffrent
between 2 wire,2 wire and 4 wire RTDs?
Answers were Sorted based on User's Feedback
In RTD, we are measuring temperature through Resistance
change. Normally we are measuring this parameter in the
field. while transmitting, these signal to control panel
through cable, some additional resistance due to distance
will add upto the RTD resistance value. which shows
incorrect value. in order to overcome these, normally in 2
wire system, we will manual add/subtract some resistance
value with the measured resistance value.but it is no percise
whereas in 3 wire system, a parallely third wire run with
the two polarity wires, but its direction of current flow is
opposite to the other two. so it will cancel the line
resistance and give exact value. similarly, for more precise
and accurate measurement, we mostly use 4 wire system.
In above mentioned description, the addition of resistance
or removal of line resistance through extra wire is called
compensation for RTD
Is This Answer Correct ? | 6 Yes | 1 No |
Answer / sandip patel
RTD means resistor temperature detector .its resistance is increase with increasing of the temperature. 2wire RTD is used for direct use of it but 4 wire RTD used when the compansation is needed in plant for removing the errors.
Is This Answer Correct ? | 7 Yes | 11 No |
What is governor of turbine?
For an Instrumentation Engineer, is there any effect on Instruments of safety zones like zone0, zone1, zone2. As an instrumentation Engineer, what we have to consider or remember while working in these areas.( zones 0,1,2).
need instrumentation job completed 1 year trainee ship in mnc pesticide company. now in search of job
hello this is dhinakar subramanian. how to piping and instrumenation drawings and also how to create the data sheets...
Coriolis flow meter coil supply is 24vdc but why still we given 230ac for this transmitter let me explained detailed review please
I have a problem with a valve (air to close). When it is fully closed and try to open 1% it doesn't responce till 3% open suddenly more than 3% then back to 3%. I tried to tune positioner then removed it, the problem still exist. Any idea
what is the role of proportional in process control?
How to Calibrate the magnetic flow meter on site ?
can i use capillary type dp transmitter converted to capillary type pressure transmitter. if i removed one side capillary tube its work correctly?
what is use of communication wire in multipare cable(oil and gas field), why this communication wire not used in single pair cable?
who to convert dc to ac
what is the meaning of GK value(fullform) in flowmeter ?