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Question
principle of rtd
 Question Submitted By :: Instrumentation
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Working principle:RTDs r having the property of changing
its resistance on change in temperature in the predictable
way.So, to measure this resistance (to indirectly measure
the temp.)small amount of current(mostly 1ma) will be
passed through the circuit.I n this way the temp. will be
measured by RTD.
 
Is This Answer Correct ?    18 Yes 1 No
Alexpandian
 
Answer
# 2
rtd based on the positive temperature coefficient(resistance
increase as increase in temperature), metal used in rtd are
platinum, copper nickel etc
 
Is This Answer Correct ?    3 Yes 1 No
Amar
 
 
 
Answer
# 3
HI FRIENDS
RTD PRINCIPLE IS
TEMPERATURE INCREASE
RESISTANCE INCREASE
 
Is This Answer Correct ?    1 Yes 1 No
G. Venkat Narayanan
 
Answer
# 4
RTD:- resistance temperature detectors
rtd is used to measure temp basicly metal used in rtd
platinum.
 
Is This Answer Correct ?    3 Yes 8 No
Jayesh
 

 
 
 
Other Instrumentation Interview Questions
 
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what is puling in n pulling out in flame scanner system?   1
what is Micro-switch and where it is used......?   7
what is the function of 3 way manifold valve in a closed loop system? Emerson 1
WE ARE HAVING YOKOGAWA CENTUM CS 3000 DCS, 2 FCS AND 4 HIS " When the operation Download to HIS message appears: Equalize start. HIS0163 WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. HIS0163 ---- ERROR = 3 WARNING = 1 ---- Tell me, please, why and how to solve the problem." Yokogawa 3
why relays are used with plc?   3
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Why do we use 24V DC supply in instrumentation? What are its merits and demerits?? JSW 1
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i have 20 kw motor & my vfd drive capcity is 18 kw if possible to use 20kw motor on this vfd?   3
hi everybody. right now i am working with thermal power plant. our company plant is tripped because of program corrupt. i would like to know is it possible when the plant is running. we are using FREELANCE ABB800F CONTROLLER.   2
what is the difference between cold loop and hot loop   2
 
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