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Compensation wire
Compensation wire (compensation cable) refers to a pair of insulated wires with the same nominal value of thermoelectric potential as the matched ther
Product details
Compensation wire (compensation cable) refers to a pair of insulated wires with the same nominal value of thermoelectric potential as the matched thermocouple within a certain temperature range. They are used to connect the thermocouple to the temperature display control instrument to compensate for the error caused by temperature changes at the connection between them and the thermocouple.
Compensation wires (compensation cables) are suitable for single or multi-point connection of automatic temperature measuring instruments in industries such as power, metallurgy, petroleum, chemical, textile, as well as national defense, scientific research and other departments.
Product standard:
Compensation wire: GB/T4989-94
Usage characteristics:
Usage temperature: Heat resistance level: -65 ℃~+200 ℃ and -65 ℃~+260 ℃;
Normal level: two types: -40 ℃~+70 ℃ and -40 ℃~+105 ℃;
Minimum bending radius: compensation wire: not less than 8 times the outer diameter of the conductor;
Compensation cable: not less than 12 times the outer diameter of the cable when armored, and not less than 6 times the outer diameter of the cable when unarmored
Main technical indicators:
Model, alloy wire material, and insulation color
|
model |
thermocouple |
Equipped with thermocouple |
Alloy thread of compensation lead |
Insulation layer coloring |
||
|
positive electrode |
negative electrode |
positive electrode |
negative electrode |
|||
|
BC |
B |
Platinum rhodium 30- Platinum rhodium 6 |
copper |
copper |
ash |
|
|
SC |
S |
Platinum rhodium 10 platinum |
SPC (Copper) |
SNC (Copper Nickel 0.6) |
red |
green |
|
RC |
R |
Platinum rhodium 13 platinum |
RPC (copper) |
RNC (Copper Nickel 0.6) |
red |
green |
|
KCA |
K |
Nickel chromium nickel silicon |
KPCA (Iron) |
KNCA (Copper Nickel 2) |
red |
orchid |
|
KCB |
KPCB (Copper) |
KNCB (Copper Nickel 4) |
red |
orchid |
||
|
KX |
KPX (Nickel Chromium 10) |
KNX (Nickel Silicon 3) |
red |
black |
||
|
NC |
N |
Nickel chromium silicon nickel silicon |
NPC (Iron) |
NNC (Copper Nickel 18) |
red |
ash |
|
NX |
NPX (Nickel Chromium 14 Silicon) |
NNX (Nickel Silicon 4) |
red |
ash |
||
|
EX |
E |
Nickel Silicon - Nickel Silicon |
EPX (Nickel Chromium 10) |
ENX (Copper Nickel 45) |
red |
palm |
|
JX |
J |
Iron copper nickel |
JPX (Iron) |
JNX (Copper Nickel 45) |
red |
purple |
|
TX |
T |
Copper Copper Nickel |
TPX (copper) |
TNX (Copper Nickel 45) |
red |
white |
|
WC3/25 |
WRe3-WRe25 |
Tungsten tungsten rhenium 25 |
WPC3/25 |
WNC3/25 |
red |
yellow |
|
WC5/26 |
WRe5-WRe26 |
Tungsten Rhenium 5-Tungsten Rhenium 26 |
WPC5/26 |
WNC5/26 |
red |
orange |
Use classification and protective layer color
|
Use classification |
Accuracy level and marking |
Coating coloring |
|||
|
Common |
Precision grade |
Common |
Precision grade |
||
|
Generally used |
G |
/ |
S |
black |
grey |
|
heat resistant |
H |
/ |
S |
black |
yellow |
Allowable deviation and reciprocating resistance
|
Compensation wire model |
The reciprocating resistance Ω/m at 20 ℃ shall not exceed |
||||
|
0.2mm2 |
0.5mm2 |
1.0mm2 |
1.5mm2 |
2.5mm2 |
|
|
NC or BC |
0.25 |
0.10 |
0.05 |
0.03 |
0.02 |
|
KCA |
3.50 |
1.40 |
0.70 |
0.47 |
0.28 |
|
KCB |
2.60 |
1.40 |
0.70 |
0.47 |
0.28 |
|
KX |
5.50 |
2.20 |
1.10 |
0.73 |
0.44 |
|
EX |
6.25 |
2.50 |
1.10 |
0.73 |
0.44 |
|
JX |
6.25 |
2.50 |
1.25 |
0.83 |
0.50 |
|
TX |
3.25 |
1.30 |
0.65 |
0.43 |
0.26 |
|
NC |
3.75 |
1.50 |
0.75 |
0.50 |
0.30 |
|
N |
7.15 |
2.86 |
1.43 |
0.95 |
0.57 |
|
WC3/25 |
0.50 |
0.20 |
0.10 |
0.07 |
0.04 |
|
WC5/26 |
0.50 |
0.20 |
0.10 |
0.07 |
0.04 |
Insulation resistance (20 ℃): PVC insulation not less than 25M Ω Km; FEP or PEA insulation not less than 100M Ω Km。
Flame retardant properties: Passed Class A (tested according to GB12666.5-90)
Specifications:
|
Structure/cross-section mm2
|
0.2
|
0.5
|
1.0
|
1.5
|
2.5
|
Number of cores
|
|
Single core wire mm
|
1/0.52
|
1/0.80
|
1/1.13
|
1/1.37
|
1/1.76
|
1 pair of wires
2-37 pairs of cables |
|
Multi strand wire core mm
|
7/0.20
|
7/0.30
|
7/0.43
|
7/0.52
|
19/0.41
|
Delivery requirements
The delivery length of compensation wires and compensation cables shall not be less than 100 meters, and the allowable length shall not be less than 20 meters for short break delivery. The quantity shall not exceed 10% of the delivery length
According to the agreement between both parties, any length of cable is allowed for delivery
Compensation wire series products: shielded compensation wire; High temperature compensation wire; Intrinsically safe compensating wire; Special compensation wires for thermocouples, etc.
Electromagnetic flowmeter K-type thermocouple thermal resistance bimetallic thermometer pressure transmitter flow transmitter
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