Answer / vinoth

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

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.

what is the difference between sensor and tranducers?

12 Answers  

---

we are having yokogawa centum cs3000 dcs in our power plant. i need some of the operator guides NOT to appear in HIS0163 AND HIS 0162 but it shoul appear in HIS0164 HOW TO DO IT?

0 Answers   Yokogawa,

---

How to convert m3/hr in tonnes/hr

2 Answers  

---

What is paid how it works

0 Answers   KOC,

---

how to do loop checking pls email to shanavaska2000@yahoo.com

2 Answers   Kentz,

---

There is a problem with our HART475 it is not communicating with smart devices error becomes "NO DEVICE FOUND"we have insert 250ohm resistance as per requirement but invain plz tell me the solution?

1 Answers  

---

hiii.... can any one provide me previous years question paper of hindustan petroleum for instrumentation engineering???

0 Answers  

---

Name different parts of a pressure gauge.

0 Answers  

---

what is sinking and sourcing....

2 Answers  

---

What is a PID controller and how can it to applied to our everyday life?

4 Answers  

---

our kks tagging is crossing more than 12 character please suggest how to take tags in the DCS

0 Answers  

---

What is stripper & spilitter ? Diffrence in this.?

0 Answers  

---