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The characteristics of the work:
1. simple assembly, convenient replacement
2. spring type temperature sensing element, good seismic performance
3. large measuring range
4. high mechanical strength, good pressure resistance
Working principle：
The electrode of the thermocouple has two different conductor materials. When the temperature difference between the measuring terminal and the reference end is different, it will generate the thermal potential, and the working instrument will show the corresponding temperature value of the thermal potential.
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Range and tolerance of temperature measurement
|
Graduation |
Tolerance grade |
|||
|
I |
II |
|||
|
Allowable difference |
Measuring range℃ |
Allowable difference |
Measuring range℃ |
|
|
K |
±1.5℃ |
-40-375 |
±2.5℃ |
-40-333 |
|
±0.004∣t∣ |
375-1000 |
±0.0075∣t∣ |
333-1200 |
|
|
N |
±1.5℃ |
-40-375 |
±2.5℃ |
-40-333 |
|
±0.004∣t∣ |
375-1000 |
±0.0075∣t∣ |
333-1200 |
|
|
E |
±1.5℃ |
-40-375 |
±2.5℃ |
-40-333 |
|
±0.004∣t∣ |
375-800 |
±0.0075∣t∣ |
333-900 |
|
|
J |
±1.5℃ |
-40-375 |
±2.5℃ |
-40-333 |
|
±0.004∣t∣ |
375-750 |
±0.0075∣t∣ |
333-750 |
|
|
T |
±0.5℃ |
-40-375 |
±1.0℃ |
-40-133 |
|
±0.004∣t∣ |
125-350 |
±0.0075∣t∣ |
133-350
|
|
