Thermocouple Compensation Wire Models and Ordering Instructions

Compensating wire models are divided into: SC, KC, KX, EX, JX, TX according to the variety of products.

Where: a) the first letter of the model and the thermocouple graduation number corresponds to.

b) the letter "X" indicates the extension of the compensation wire (type)

c) The letter "C" indicates the compensation type compensation wire (type).

Note: SC type compensation wire can be used with R type index thermocouple.

1, compensation cable according to the product variety is divided into: SC BC KC KX JX TX EA, where the letter "×" that extends the type of compensation wire, letter

"C" indicates that the thermal potential and resistance of the compensation cable in accordance with the following table.

2, compensation cable moisture test insulation resistance in water at 40 ℃ for 24 hours after not less than (10 m) 25MΩ.

3, compensation cable heat-resistant aging 24 hours after 5 times the outer diameter test, by the voltage test 5000V/1min does not breakdown.

The role of compensation wire
Is to extend the hot electrode that is the cold end of the mobile thermocouple, and display instrumentation connected to form a temperature measurement system. The product is mainly used in various temperature measurement devices, has been widely used in nuclear power, petroleum, chemical, metallurgy, electric power and other sectors.

Ordering instructions
When ordering, you need to indicate the model, specification, core cross-section, number of cores, shielding method and quantity.

Example: EX-GV2R-GS 2×2.5mm21500m EX-FPF-GS 24×2×2.5mm21000m(total shielding)

KX-HF4BPP-GS 12×2×1.5mm212000m(split screen)

Thermocouple Compensation Wire

Selection of thermocouple compensation wire to know the thermocouple compensation wire in the ambient temperature and the site of industrial and mining conditions, according to the site of the ambient temperature to choose the appropriate compensation wire sheath, the general ambient temperature of -25 ~ 105 ℃ when the choice of polyfluoroethylene sheath, the ambient temperature of -60 ~ 205 ℃ when the choice of polyperfluoroethylene as a sheath of the compensation wire, and in the -60 ~ 260 ℃ when the choice of PTFE as thermocouple compensation wire sheath. So in the choice must pay attention to the site industrial and mining conditions.

Thermocouple compensation wire temperature measurement principle

The role of thermocouple compensation wire is to extend the hot electrode that is the cold end of the mobile thermocouple, and display instrumentation connected to form a temperature measurement system. Products are mainly used in a variety of temperature measurement devices, has been widely used in petroleum, chemical, metallurgy, electric power and other sectors.

Generally speaking, the thermocouple from the temperature measurement table may distance dozens of metres, thermocouple cold end (outgoing end) temperature and temperature measurement table ambient temperature is different (even up to dozens of degrees).

If you use ordinary copper wire, according to the thermocouple principle, the wiring will produce temperature difference potential, it will produce measurement error.

Long-distance transmission wire pressure drop problem, because the temperature measurement table input impedance is high, thermocouple generated temperature difference potential (millivolt level) transmission current (micro A level) is very small, the loss of pressure drop on the wire is very small, in general, within the error. So there are thermocouple transmitters, input thermocouple signal, output 4-20ma, so that you can do not want to compensate for the wire, but also can be transmitted over long distances.

If the use of compensation wire (must be matched with the thermocouple index number), it is selected metal materials, can produce the smallest possible temperature difference potential at the junction, as much as possible to reduce the temperature measurement error. In other words, the cold end of the thermocouple is moved to the temperature measurement table.