Thermocouple Time Constant

Thermal inertia level time constant (seconds) Thermal inertia level time constant (seconds) I 90-180 III 10-30 II 30-90 IV <10 ◆Thermocouple nominal pressure: Generally refers to the static external pressure that the protective tube can withstand before bursting at the operating temperature.
◆ Minimum Insertion Depth of Thermocouple: Should not be less than 8-10 times the outer diameter of its protective sleeve (except for special products)
◆ Insulation Resistance: ≥5 Megohms (at 100V) when the surrounding air temperature is 15-35°C and relative humidity is <80%. For thermocouples with a splash-proof terminal box, the insulation resistance is ≥0.5 Megohms (at 100V) at a relative temperature of 93±3°C.
    ◆ Insulation Resistance at High Temperatures: The insulation resistance between the thermoelectric junction (including the two-junction type) and the protective tube, as well as between the two-junction thermoelectric junctions (measured per meter), should be greater than the values specified in the table below at high temperatures. Insulated Resistance Value (Ω) at Specified Long-Term Operating Temperature (°C) Test Temperature (°C) ≥60060072000 ≥80080025000 ≥100010005000

Model Naming Method