TERMOELECTRIC SRL Pascani, Str. Vatra No. 46, Iasi 705200
Mobile: +4 0722 530 865; Phone/Fax: +4 0332 566 649
Mobile:
E-mail: [email protected]; Web: www.termoelectric.ro
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Extension cables (compensation)
I. General
Compensation cables of the thermocouples is used for extension,
respectively enlarging free extremities of the thermoelectrodes from the
variable temperature zones. Compensation cables also connects the
thermoelectric voltage measuring devices.
II. Function, description
Principle of function of the
the extension cables is based on the
thermoelectric effect, which says that the thermoelectric tension of a
thermocouple suffer no changes when in its circuit are introduced two
capacitors made from different materials, if they have identical thermoelectric
characteristics with those of the thermoelectrodes and the connection points
are at the same temperature.
Extension cables of thermocouples consists of two conductors made of
wire which can be simple or stranded, electrically insulated. The conductors
are made of the same materials as thermoelectrodes that has to be extended.
TERMOELECTRIC SRL Pascani, Str. Vatra No. 46, Iasi 705200
Mobile: +4 0722 530 865; Phone/Fax: +4 0332 566 649
Mobile:
E-mail: [email protected]; Web: www.termoelectric.ro
1.
2.
3.
4.
5.
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Coating (PVC, Teflon);
Metallic braid (Cu, Fe etc.);
Coating (PVC, Teflon);
Positive thermoelectrode (+), single/stranded;
Negative thermoelectrode (-), single/stranded;
Thermocouple
PtRh – Pt
Chromel - Alumel
Cu - Constantan
Fe - Constantan
Positive
Copper
Chromel
Copper
Iron
Cable conductors
Negative
Alloy 99.4%Cu+0.6%Ni
Alumel
Constantan
Constantan
Maximum
length (m)
500
200
500
500
∅1max
(mm)
5
10
5
5
The client will order precisely the type of the extension cable,
conformation of the insulator braid (PVC/Teflon), conductor type
(single/stranded), outside diameter and necessity of the metallic braid.
∅1max
(mm)
1
2
1
1