Thermocouple compensation cable

J-type thermocouple compensation wire

J-type thermocouple compensation wire
thermocouple compensation wire
Product description: The J-type thermocouple compensation wire is used to extend the cold electrode, that is, the cold end of the moving thermocouple, and is connected with the display instrument to form a temperature mea
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The J-type thermocouple compensation wire is used to extend the cold electrode, that is, the cold end of the moving thermocouple, and is connected with the display instrument to form a temperature measurement system. The J-type thermocouple compensation wire is produced using the national standard IEC584-3 "Thermal Part III - Compensation Wire". Compensating wire and thermocouple are mainly used in various temperature measuring devices, and have been widely used in nuclear power, petroleum, chemical, metallurgy, electric power and other departments.
J type thermocouple compensation wire structure

J type thermocouple compensation wire type

Type	Structural materials
JX-VV	Polyvinyl chloride insulation and sheathing common compensation wire and cable for thermocouples with J index
JX-VV22	Polyvinyl chloride insulated and sheathed steel tape armored compensating cable for ordinary grade J index thermocouple
JX-VPV	Polyvinyl chloride insulated and sheathed copper wire braided shielded conductor wire and cable for common grade J thermocouples
JX-VPV22	PVC insulated and sheathed copper wire braided sub-shield steel strip armored ordinary grade J index thermocouple compensating cable
JX-VVP	Polyvinyl chloride insulated and sheathed copper wire braided general shielded thermocouple compensation cable for ordinary grade J
JX-VV22P	PVC insulated and sheathed copper wire braided general-shield steel strip armored ordinary grade J index thermocouple compensation cable
JX-VPVP	Polyvinyl chloride insulated and sheathed copper wire braided sub-shield and total shielded common-grade J-type thermocouple compensation cable
JX-VPV22	PVC insulated and sheathed copper wire braided sub-shield and total shield steel tape armored ordinary J index thermocouple compensation cable
JX-FF	Fluoroplastics and sheathed compensating wires and cables for thermocouples of ordinary grade J
JX-FPF	Fluoroplastic and sheathed copper wire braided sub-shield shielded wires and cables for common grade J thermocouples
JX-FFP	Fluoroplastic and sheathed copper wire braided general shielded compensating wires and cables for common grade J thermocouples
JX-FPFP	Fluoroplastic and sheathed copper wire braided sub-shield and total shielded thermocouple compensation cable for ordinary grade J index

J-type thermocouple compensation wire temperature measurement principle
Generally speaking, the J-type thermocouple may be separated from the thermometer by several tens of meters, and the temperature of the J-type thermocouple cold end (outlet end) is different from the temperature of the temperature measuring instrument (even up to several tens of degrees). If a common copper wire is used, according to the thermocouple principle, the temperature difference potential will be generated at the wiring, and measurement errors will occur. The voltage drop of the long-distance transmission wire, because the input impedance of the thermometer is high, the temperature difference potential (millivolt order) generated by the J-type thermocouple is small (micro-A level), and the voltage drop loss on the wire is small. In general, it is within the error range. So there is a thermocouple transmitter, input thermocouple signal, output 4-20ma, so you can not compensate the wire, but also can be transmitted from a long distance. If a J-type thermocouple compensation wire (which must be matched with the thermocouple indexing number) is used, the metal material selected can produce as small a temperature difference potential as possible at the wiring, minimizing the temperature measurement error. In other words, move the cold junction of the J-type thermocouple to the temperature measurement instrument.

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