why we are using ungrounded RTD sensor and what is difference
between grounded RTD and Ungrounded?
- 1 Answers
- 13605 Views
- I also Faced
- E-Mail Answers
Answer Posted / carl_ellis
Show me a 'grounded RTD'. I have never seen a commercial
grounded RTD. The probability of a measurement error due to a
ground loop is too high.
An RTD measurement requires a stable, constant current
source, which is generated by the sensing circuit. If an RTD
element were grounded, a ground loop could affect the current
source depending on the difference in ground potentials at the
RTD element and the sensing circuit. That would create an error
in the measurement.
Grounded thermocouples work some of the time, but other
times some form of isolation is needed because of a ground loop
issue with a thermocouple.
You use ungrounded RTDs because that's the best way for them
to function.
Carl Ellis
Measure First
| Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
Draw symbols of the following :
flow transmitter formula?
what step is taken for ESD ( emergency shut down) in DCS REPLY to hashimka20009@gmail.com
Why upper weighing limit of electronics balance is 90% of the total weighing capacity?
How would you choose differential range?
How many ohms are required for proper earthing?
which type of zones used for boiler? & why ?
Why we are using reverse action in displacer types level transmitters on some Vessels?
Why thermo wells are used? What materials are used in thermo wells?
How to convert milliampares into flow??
why orfice is not used for main steam flow calculation
can you send remote seal interface level transmitter calculation steps for oil water saperator.
hi my name is rakesh patel i just complited my be in instrumentation & control now i am going to working as a validation engineer in a poject department so what is a scope in a future as a validation engginer ? what line is good for me can any bady give me complete solution please? your regard rakesh patel
If fire would be inside the plant which fire detector is to detected the fire.
Explain the use of hair spring in the pressure gauge.
