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1. Fundamentals
Thermal
resistance is the use of material changes in temperature itself also
changes with the resistance characteristics to measure the temperature. The
heated portion of the thermal resistance (temperature sensing element)
is a thin metal wire uniformly wound on the double skeleton made of
insulating material, when measured medium in the presence of a
temperature gradient, the measured temperature range where the
temperature sensing element the average temperature in the dielectric layer.
2. The main technical parameters
Name platinum resistance
Indexing number Pt100
Temperature range -5 ~ 170 ℃
Tolerance class A ± (0.15 + 0.002|t|) ℃
Grade B ± (0.30 + 0.005|t|) ℃
3. Thermal response time
Thermal response time is under the effect of temperature step, the
output changes when the thermal resistance value is equivalent to 50% of
a step change in the time required by τ0.5 to represent.
Thermal resistance thermal response time reference
Diameter (mm) Φ3 Φ4 Φ5 Φ6 Φ8
τ0.5 (s) ≤3 ≤5 ≤8 ≤12 ≤18
NOTE: When the armored element and outer protective tubes sheathed
armored thermal resistance of the whole, since the protective tube
diameter and wall thickness is much larger than the sheath, so the
thermal response time depends on the dynamic response of the protective
tube
4. Insulation resistance at room temperature
100MΩ
"">Thermal resistance at an ambient temperature of 15-35 ° C, relative
humidity less than 80%, the test voltage is 10-100V (DC) Insulation
resistance between the electrode and the jacket pipe> 100MΩ
Insulation resistance:
Room temperature ≥2000MΩ
High temperature (500 ℃) ≥300MΩ
Configuration type measuring terminal
5. Protection tube material
Generally 1Cr18Ni9Ti 0Cr18Ni12Mo2Ti
6. Product performance standards
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