+39.0381.347.857 Home Azienda Prodotti Dati tecnici Certificazioni News Contatti Cataloghi Cables Standard colours for thermocouples compensating cables Termotech markets a series of cables for signal transmission and for thermocouples; the type of insulation and the production of the cables depends on the temperature and type of atmosphere in which the cable will be placed. Some of the physical characteristics of the different types of insulation cables are given below: Insulator Temperature range Abrasion resistance Humidity resistance Flame behavior Notes A = Excellent, B = Good, C = Sufficient, D = Poor Fiber glass +400 °C D D Not combustible Good high temperature resistance Silicone rubber -40 +200 °C C B Self-extinguishing Excellent flexibility even at low temperatures Fluoropolymer Mfa -200 +250 °C A A Self-extinguishing Very good resistance to chemical agents and excellent mechanical characteristics P.V.C -20 +105 °C B B Self-extinguishing Good mechanical and electric characteristics KAPTON® -200 +400 °C B B Self-extinguishing Excellent dielectrical and chemical characteristics In measuring temperature with thermocouples is vital that the voltage signal produced by them is transmitted unaltered to the measuring device; for this reason the cable used for this connection must have thermoelectrical characteristics which are the same as, or similar to, those of the thermocouple. There are three types of cable for thermocouples: Thermocouple cable Extension cable Compensation cable Thermocouple cables are used to construct true and proper thermocouple sensors which guarantee all the thermoelectrical characteristics of the thermocouple for the entire temperature range defined by the reference standard adopted. Extension cables are generally used to connect the thermocouple to the measuring device; the conductors of this are of the same type as those of the thermocouples but guarantee their thermoelectrical properties within a limited temperature range (generally 0 - 200°C). Compensation cables are also used to connect the thermocouples to the measuring devices but, although they maintain unaltered all their thermoelectrical properties for a limited temperature range (0-100 °C or 0-150 °C), they comprise conductors of a different type from those of the thermocouples. For example the compensated cable for "S" type thermocouples has a copper positive conductor and a copper-nickel alloy negative conductor. The following table shows the composition of the conductors and the tolerances for extension and compensation cables with reference to the most common international standards. Standard Type Conductors Range °C Error limit TC's temperature 1 2 DIN 43710 UX Cu/CuNi 0 +200 - ±3,0 °C - LX Fe/CuNi 0 +200 - ±3,0 °C - IEC 584 TX Cu/CuNi -25 +100 ±30 µV (±0,5 °C) ±60 µV (±1,0 °C) 300 °C EX NiCr/CuNi -25 +200 ±120 µV (±1,5 °C) ±200 µV (±1,5 °C) 500 °C JX Fe/CuNi -25 +200 ±85 µV (±1,5 °C) ±85 µV (±1,5 °C) 500 °C KX NiCr/NiAl -25 +200 ±60 µV (±1,5 °C) ±100 µV (±1,5 °C) 900 °C KCA Fe/CuNi 0 +150 - ±100 µV (±2,5 °C) 900 °C KCB Cu/CuNi 0 +100 - ±100 µV (±2,5 °C) 900 °C RCA Cu/CuNi 0 +100 - ±30 µV (±2,5 °C) 1000 °C RCB Cu/CuNi 0 +200 - ±60 µV (±5,0 °C) 1000 °C SCA Cu/CuNi 0 +100 - ±30 µV (±2,5 °C) 1000 °C SCB Cu/CuNi 0 +200 - ±60 µV (±5,0 °C) 1000 °C NX Nicrosil/Nisil -25 +200 ±60 µV (±1,5 °C) ±100 µV (±1,5 °C) 900 °C BC Alloy Cu/Cu 0 +100 - ±40 µV (±3,5 °C) 1400 °C ANSI MC96.1-1982 TX Cu/CuNi 0 +100 ±0,50 °C ±1,10 °C EX NiCr/CuNi 0 +200 - ±1,70 °C JX Fe/CuNi 0 +200 ±1,10 °C ±2,20 °C KX NiCr/NiAl 0 +200 - ±2,20 °C SX Cu/CuNi 0 +200 - ±57 µV (±5,0 °C) > 870 °C NX Nicrosil/Nisil BX Cu/Cu 0 +100 - +0,000 µV ("0 °C) -33 µV (±3,7 °C) > 1000 °C BX Alloy Cu/Cu 0 +200 - -33 µV (±3,7 °C) > 1000 °C © 2021 · TERMOTECH SRL · via Montebello, 45 · 27029 Vigevano, Pavia · Italy · T +39.0381.347.857 · F +39.0381.341.042 · E termotech@termotech.com P. IVA IT01388790188 · R.E.A. PAVIA n. 183099 · Capitale Sociale: € 50.000 Note legali Condizioni di vendita Informativa sulla privacy