Thermocouple assembly -WRN-231
Thermocouple assembly -WRN-231
Industrial thermocouple assembly as a temperature sensor, usually display instruments, recording instruments and supporting the use of electronic regulator. Fabricated thermocouple can be measured directly from a variety of production in the range of 0 ℃ to 1800 ℃ of liquid vapor and gases as well as the surface temperature of solids.
According to state regulations, I produced in accordance with IEC international standard indexing number of platinum and rhodium 30 - 6 platinum and rhodium, platinum and rhodium 10 - platinum, nickel chromium - nickel silicon, nickel chromium - constantan thermocouple assembly and so on.
Assembly thermocouple temperature sensing element is usually installed fixtures and junction boxes composition and other major components.
Measuring range and tolerance range
Note: t is the measured temperature sensing element temperature (℃)
Thermocouple type code No. indexing measurement range Basic error limit
Nickel-chromium - constantan WRKE0-800 ℃ ± 0.75% t
Nickel-chromium - nickel silicon WRNK0-1300 ℃ ± 0.75% t
Platinum and rhodium 13-- platinum WRBR0-1600 ℃ ± 0.25% t
Platinum and rhodium 10 - platinum WRPS0-1600 ℃ ± 0.25% t
Platinum and rhodium 30-- platinum and rhodium 6WRRB0-1800 ℃ ± 0.25% t
Thermocouples time constant
The level of thermal inertia time constant (in seconds) the level of thermal inertia time constant (in seconds)
Thermocouple Pressure: generally refers to rupture at the working temperature protection tube can withstand a static external pressure.
Thermocouple minimum insertion depth: not less than 8-10 times the outer diameter of the protective sleeve (special products out exceptions)
Insulation resistance: When the ambient air temperature is 15-35 ℃, relative humidity (80% Insulation resistance ≥5 megohms (voltage 100V) with a splash thermocouple junction box, relative humidity of 93 ± 3 ℃ when, ≥0.5 megohms insulation resistance (voltage 100V)
Insulation resistance at high temperatures: Thermocouples at high temperatures, the thermal electrode (including the double-supported) Insulation resistance (per meters) and protective tube and dual branch heat between the electrodes should be greater than the value specified in the following table.
Thermocouple wire compensation, compensation cable
Thermocouple wire, with the compensation effect is to extend the hot electrode that is mobile thermocouple cold end, temperature measurement and display instrument constituting the coupling system. This product uses GB / T 4989-94 (thermocouple with compensation wire) national standard (equivalent use IEC584-3 (Part III Thermocouple - compensation wire) international standard), an insulating layer and protective layer made of imported high-quality fluorine plastic, and the overall continuous extrusion using new technology, so that the product has excellent resistance to acid, alkali, abrasion and noncombustible extension of performance, long-term use can be immersed in water. Use temperature -60-205-260 ℃, belonging to the contemporary international advanced level. Products are mainly used in a variety of temperature measurement devices, it has been widely used in petroleum, chemical, metallurgy, electricity and other sectors.