Interested to Buy Any Domain ? << Click Here >> for more details...
Why three wire is using with a RTD?
- 3 Answers
- 12090 Views
- ABB, MAHINDRA, I also Faced
- E-Mail Answers
Answer Posted / guest
Resistanc Temperature Detector(RTD)encorporates two basic
concepts
1)Variation of temperature varies the resistance of Pt wire.
2)Variation in resistance affects the balancing of DC
bridge circuit.
For measurement purposes lead wires are brought out to make
external connections.These lead wires have some resistances
which affects the bridge balancing.
Since we can not reduces the resistances of lead wire to
zero.So, either 3 wire or 4 wire connection is employed to
ELIMINATES THE IMBALANCING TO THE BRIDGE CIRCUIT caused by
resistances of lead wires so that an accurate measurement
can be made.These wires(3 or 4) are called compensating
leads.
Author:arbelectbit@yahoo.com
| Is This Answer Correct ? | 29 Yes | 4 No |
Post New Answer View All Answers
all types of liquid analyzer principle with drawing?
I am using 971 Enraf radar level transmitter for LPG tanks ,the tank side indicator gives the error code 999999999FL can any body give me any diagnostic for this issue?
What is the basic difference between Modbus and CAN Open Protocols
Tr. Wiring for calibration.
when placing a vent or drain hole on an orifice plate should you measure from the center of the bore up or down for the vent placement?
I want to know the questions asked in ONGC interview(after being selected in the written exam) for Instrumentation branch.Kindly help.
Drum level tx with GP4 with zero elevation:7300mmh20 on HP and 8050mmh2o on LP as range but on commissioning the tx readiing is max,Why this reading?
sir ,iam in dem urgent need of HPCL Paper of Instrumentation Branch plz send me at your earliest convenience at ujjwal_sharma1983@yahoo.com
Senior engineer's please help me, what is Loop Checking and Loop test? and write difference also? soon urgent
What are different types of control valves?
what is thermo coupler and how it works
applications of plc in printing and packaging?
i need some objective type questions in instrumentation
Why is the orifice tab provided?
IN CONTROL VALVE SPECIFICATIONS GENERALLY TERM " DE- 200" ."DM -400"USED,, WHAT IS DE/ DM STANDS FOR?
