Resistance value (R100) of thermal resistance temperature element at 100 C and the ratio of its resistance value at 0 (R0) (R100/R0)

Degree Pt100: class a R0=100 + 0.06, R0=100 class B + 0.12

Degree Cu50:R0=50 + 0.05

Thermal response time: when the temperature appears step change, the change of the heat resistance of the heat resistance is equivalent to 50% of the time required by the step change, which is called the thermal response time by T0.5.

Thermal resistance of the nominal pressure: generally refers to the operating temperature of the tube can withstand the external pressure (static pressure) without cracking. Nominal pressure is not only related to the material, diameter and wall thickness of the protective tube, but also to the structural form, the installation method, the depth of insertion, the flow rate and the type of the measured medium.

Minimum insertion depth of thermal resistance

Lmin = l yuan +15D

The minimum insertion depth Lmin available

L element - temperature sensing element length

The diameter D protection tube

Natural influence: through the measurement of the current 5mA in the thermal resistance, the measured resistance increment is converted into temperature value should be no more than 0.30.

Insulation resistance: room temperature insulation resistance of the test voltage desirable DC 10 ~ 100V arbitrary values, environmental temperature in the range of 15 to 35 degrees Celsius, the relative humidity should not be greater than 80%. The room temperature insulation resistance value shall be not less than 100M.