1．Application
Compensating lead wire and cable are，together with thermocouples (TC)，used in the temperature measurement and control systems in many factories，mines and other enterprises of metallurgy，chemical industry，power industry as well as scientific research institutions．The technical performance is in compliance with GB/T4989-94 regulations．
The graduation of a thermocouple should be done with 0℃ at the reference end．The reference end of all industrial thermocouple usually is not at 0℃, which will lead to measurement error．The higher the temperature of the reference end is, the greater the deviation from the actual value will be．If the temperature of the reference end is not steady，the measured value is consequently unsteady．Therefore，normally，a compensating wire is adopted to eliminate this error by extending the reference end to a thermostatic bath or to a place far from the heat resource where the temperature of the surrounding media is constant or of little change．
用途
补偿导线和补偿电缆与热电偶配套，用于冶金、化工、电力等厂矿及科研部门中的温度测量和控制系统，产品性能按GB／T4989-94要求。
各种热电偶的分度是在参比端为0℃时制定的。工业上应用的热电偶，其参比端通常不在0℃，这就将引起测量误差，参比端温度越高，实际温度偏离真实温度就越大，参比端温度不稳定，实测温度也就不稳定。因此，为了消除这部分误差，往往采用补偿导线，将热电偶参比端延伸到恒温槽或引到远离热源周围介质温度恒定或变化很小的场所。
2．Temperature Range，Thermal Electromotive Force(TEMF) Allowance and Reciprocating Impedance of Compensating Lead Wire and Cable
补偿导线补偿电缆的温度范围、热电动势允差及往复电阻
|
Thermo-
couple Gradua-
tion
Number
热电偶分
度号 |
Type
型号 |
Appli-
cation
class
使用
分类 |
Tempera-
ture Range
of Wire
and Cable
电线电缆温
度范围(℃) |
Nominal
TEMF
Value
热电动势
标称值
(±μV) |
TEMF Allowance
热电动势允差 |
TC
Measur-
ing End
Temp
热电偶测
量端温度
(℃) |
Reciprocating
resistance at 20℃
20℃时往复电阻值Q／m |
|
Precision
Class
精密级
(±μV) |
Ordinary Class
普通级
(±μV) |
0.22 |
0.52 |
1.02 |
1.52 |
2.52 |
|
S(R) |
SC
(RC) |
G
H |
0～100
0～200 |
645
1440 |
30(±2.5℃)
-- |
60(±5.0℃)
60(5.0℃) |
1000 |
0.25 |
0.1 |
0.05 |
0.03 |
0.02 |
|
K |
KCA
KCA
KCB |
G
H
G |
0～100
0～200
0～100 |
4095
8137
4095 |
60(±1.5℃) |
100(2.5℃) |
1000
900
900 |
3.5
3.5
2.6 |
1.4
1.4
1.04 |
0.7
0.7
0.52 |
0.47
0.47
0.35 |
0.28
0.28
0.21 |
|
KX |
G
H |
-20～100
-40～200 |
4095
8137 |
60(1.5℃) |
100(2.5℃) |
900 |
5.5 |
2.2 |
1.1 |
0.73 |
0.44 |
|
E |
EX |
G
H |
-20～100
-25-200 |
6317
13419 |
120(1.5℃) |
200(2.5℃) |
500 |
6.25 |
2.5 |
1.25 |
0.83 |
0.5 |
|
J |
JX |
G
H |
-20～100
-25-200 |
5268
10777 |
85(1.5℃)
85(1.5℃) |
140(2.5℃)
140(2.5℃) |
500 |
3.25 |
l.3 |
0.65 |
0.43 |
0.26 |
|
T |
TX |
G
H |
-20～100
–25～200 |
4277
9285 |
30(0.5℃)
48(0.8℃) |
60(1.0℃)
90(1.5℃) |
300 |
2.6 |
1.04 |
0.52 |
0.35 |
0.21 |
|
N |
NC |
G
H |
0～100
0～200 |
2774
5912 |
60(1.5℃) |
100(2.5℃) |
900 |
3.75 |
1.5 |
0.75 |
0.5 |
0.3 |
|
NX |
G
H |
-20～100
–25～200 |
2774
5912 |
60(1.5℃) |
100(2.5℃) |
900 |
7.15 |
2.86 |
1.43 |
0.95 |
0.57 |
3．Structural Code and Working Temperature Range of Compensating Cable 补偿电缆结构代号及温度使用范围
|
Category
类别 |
Structural Code
结构代号 |
Shield Material
屏蔽材料
(Overall／individual shield code)
(总屏／分屏代号) |
Working Temperature Range
使用温度范围
(℃) |
|
No Shield
无屏蔽 |
Individual Shield
分相屏蔽 |
0verall Shield
总屏蔽 |
0verall Shield + individual Shield
分相屏蔽+总屏蔽 |
|
General use
一般用(G) |
VV
VVl00 |
VVDl
VVD2
VVD3 |
VVPl
VVP2
VVP3 |
VVDlPl
VVD2P2
VVD3P3 |
Copper Wire铜丝
(P1／D1) |
-15～70
-15～100 |
|
Heat Resistant
耐热用
|
ZF |
ZFDl
ZFD3 |
ZFPl
ZFP3 |
ZFDlPl
ZFD3P3 |
Copper Tape铜带
(P2／D2) |
-60～200 |
|
HF4 |
HF4Dl
HF4D3 |
HF4P1
HF4P3 |
HF4DlPl
HF4D3P3 |
-60～260 |
|
PFF |
PFFDl |
PFFPl |
PFFDlPl |
Al-Pl Composite Belt铝塑复合带
(P3／D3) |
-60-260 |
|
PGG |
PGGDl
PGGD3 |
PGGPl
PGGP3 |
PGGDlPl
PGGD3P3 |
-60～180 |
4．Compensating Cable Color Identification (equivalent to IEC 584-3) 补偿电缆识别标志(等效lEC 584-3)
|
Insulation Color
绝缘颜色 |
Sheath Color General use(G)
护套颜色
一般用(G) |
|
Type
型号 |
SC(RC) |
KC |
KX |
EX |
JX |
TX |
NC |
NX |
|
Positive
正极 |
Orange
橙黄 |
Green
绿 |
Green
绿 |
Purple
紫 |
B1ack
黑 |
Brown
棕 |
Pink
粉红 |
Pink
粉红 |
0rdinary
普通级 |
Precise
精密级 |
|
Negative
负极 |
White
白 |
Black
黑 |
Grey
灰 |
|
5．Matters needing attention
|
|
补偿导线使用应注意的问盟 |
|
1) Compensating cables are only to be used with matching type of thermocouples.
|
|
1)各种补偿导线只能与相应型号的热电偶配用。 |
|
2) Warning：The po1arity of the compensating wire shall not be reversed otherwise greater error may be induced．
|
|
2)使用补偿导线时，切勿将其极性接反，否则不但不能补偿，相反还会因抵消作用而造成更大的误差。 |
|
3) Since the electrode material of compensating wire and cable and thermocouple are different，the two contacts at the connection must be at the same temperature to avoid further error. |
|
3) 由于补偿导线和热电偶的热电级材料并不完全相同，所以要求它们连接处两接点温度相同，否则又会引入误差。 |
6. Diagram of the cable cross-section 产品结构示意图
|
