Armored Thermocouple
Application
It is usually connected with display meter, recording meter and computer, etc. to directly measure temperature of liquid, vapor, gas and solid surface ranging from 0℃ to 1300℃ during various production process.
Features
With quick response, reducing dynamic error；
Optional installation methods；
Wide measuring range ；
High mechanical strength, good pressure-resistant performance；
Operation theory
The electrodes of armored thermocouple are made of two different materials. the temperature difference between measuring end and reference end results in pyroelectric potential ,then the meter indicates the corresponding temperature to the pyroelectic potential.
Mail technical parameters
Executive standard
IEC584
IEC1515
GB/T16839-1997
JB/T5582-91
Measuring range & Tolerance
Type |
Graduation |
Tolerance class |
I |
II |
Tolerance value |
Measuring range℃ |
Tolerance value |
Measuring range℃ |
WRNK |
K |
±1.5℃ |
-40~+375 |
±2.5℃ |
-40~+333 |
±0.004|t| |
375~1000 |
±0.0075|t| |
333~1200 |
WRMK |
N |
±1.5℃ |
-40~+375 |
±2.5℃ |
-40~+333 |
±0.004|t| |
375~1000 |
±0.0075|t| |
333~1200 |
WREK |
E |
±1.5℃ |
-40~+375 |
±1.5℃ |
-40~+333 |
±0.004|t| |
375~800 |
±0.004|t| |
333~900 |
WRFK |
J |
±1.5℃ |
-40~+375 |
±1.5℃ |
-40~+333 |
±0.004|t| |
375~750 |
±0.004|t| |
333~750 |
WRCK |
T |
±1.5℃ |
-40~+125 |
±1℃ |
-40~+133 |
±0.004|t| |
125~350 |
±0.0075|t| |
133~1000 |
WRPK |
S |
±1℃ |
0~+1100 |
±2.5℃ |
0~600 |
±[0.003(t-1100)] |
1100~1600 |
±0.0025|t| |
600~1600 |
Insulation resistance at normal temperature
The insulation resistance between electrode and protection tube of armored thermocouple is no less than 1000M Ω.m under condition that environment temperature is 20±15℃，relative humidity is no more than80%，and testing voltage is D.C.500±50V.
The insulation resistance of 1M long tested sample is 1000MΩ ,and that of 10M long tested sample is 100MΩ；
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