A thermocouple is called “grounded” when the sensing junction is connected (physically and electrically) to the metal case. There are advantages and disadvantages but generally ungrounded thermocouples are preferable, providing a slower response time is acceptable.
| Thermocouple
|
Advantages |
Disadvantages |
| Grounded |
Provides intimate contact for a faster response time |
Grounded tip construction is susceptible to induced noise from ground loops, resulting in a less accurate reading |
Ungrounded
|
Provides a more accurate reading |
Slower response time |
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