Range specification

Class code graduation measuring range precision grade allowed deviation t

Nickel chromium-nickel silicon WRNT K0-800I ± 1.5℃± 0.004, t technology

II ± 2.5℃or± 0.0075, t technology

Nickel chromium copper nickel WRET E0-600I ± 1.5℃± 0.004, t technology

II ± 2.5℃or± 0.0075, t technology

Copper copper nickel WRCT T -40-350I ± 0.5℃± 0.004, t technology

II ± 1℃± 0.75%t

Platinum resistance WZPT Pt100-200-500 A-level±(0.15+0.002, t, )

The B class (0.30+0.005, t, )

Copper resistance WZCT Cu50-50-100II ±(0.30+6.0X10-3t )

Note: the" t" as a temperature-sensing element measured temperature, for platinum resistance and copper resistance for temperature sensing element measured temperature absolute value.

Nominal pressure

Generally refers to the ambient temperature, protection tube can bear static pressure without rupture, test pressure generally use the nominal pressure of 1.5 times. In fact, allowable working pressure not only with the protection tube material, diameter, wall thickness, but also the structure, installation method, insertion depth and the medium to be measured, the kinds of velocity.

Thermocouple insulating resistance:

Normal temperature insulation resistance test voltage is DC 500V. Measurement of insulation resistance at room temperature atmospheric conditions were: temperature 15～ 35 ℃, relative humidity 45%, atmospheric pressure of 86 ～106Kpa.

For more than 1 meters in length of the thermocouple, its normal value of insulation resistance and the length of the product is not less than 100000000000000o m,

That is: Rr L >100M L > 1mΩ M

Type: Rr- thermocouple temperature insulation resistance value, M Ω;

L- thermocouple length, M.

For a length equal to or less than 1meters of the thermocouple, its normal value of insulation resistance shall not be less than 100 MΩ.

Thermal resistance insulation resistance:

Normal temperature insulation resistance test voltage desirable DC10 ~ 100V arbitrary value, the ambient temperature at 15～ 35 ℃, relative humidity should be less than 80%, at normal temperature and insulation resistance shall not be less than 100 MΩ.