| Thermocouple Compensating Cables |
| REFERENCE STANDARDS |
|
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INTERNATIONAL :
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NATIONAL :
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BS 5308, ANSI MC 96 1
IS 8784, IS 6720, IS 2054, IS 2055, IS 2056, IS 5831,
IS 1554 |
| CONDUCTOR |
SPECIAL ALLOYS. |
| INSULATION |
A. PVC SUITABLE FOR
70°C/85°C OPERATION |
| |
B. MEDIUM/ HIGH DENSITY
POLYETHYLENE |
| FORMATION |
MULTIPAIR (UPTO 24 PAIR) |
| SCREENING |
INDIVIDUAL AND OVERALL |
| |
A. ALUMINIUM MYLAR
WITH 100% COVERAGE & 20% OVERLAP |
| |
B. BRAIDING WITH 0.15/0.2/0.3MM
ATC ELECTROLYTIC TINNED COPPER |
| DRAIN WIRE |
ATC OF SUITABLE DIA ALONGWITH METALLIC
SIDE OF SCREEN. |
| ARMOUR |
G.I. WIRE/STRIP AS PER IS: 3975 (OPTIONAL) |
| INNER/OUTER SHEATH |
PVC/FRLS , PVC/LOW HALOGEN VERY LOW
SMOKE POLYMER |
| SPECIAL TESTS |
L/R RATIO, THERMO EMF CHARACTER, LOOP
RESISTANCE, CAPACITANCE. |
| INDUCTANCE |
| Type
of Thermo couple |
Type
of Conductor |
Colour |
Inductance
Micro H/Mtr. Inductance |
| ANSI IS:8784 |
| +ve |
-ve |
+ve |
-ve |
| EXTENSION |
| KX |
+CHROMEL
-ALUMEL |
YELLOW |
RED |
RED |
GREEN |
4.00 |
| JX |
+Fe
-Con |
WHITE |
RED |
RED |
BLUE |
8.00 |
| TX |
+Cu
-Con |
BLUE |
RED |
RED |
BLACK |
1.20 |
| EX |
+CHROMEL
-Con |
VIOLET |
RED |
RED |
VIOLET |
4.00 |
| COMPENSATING |
KX(A)
VX |
+Ni/Cr
-Ni/Al |
BROWN |
RED |
RED |
GREEN |
1.20 |
SX
VX |
+Cu
-CU/Ni |
BLACK |
RED |
RED |
WHITE |
4.00 |
| FOR CABLES AS PER IS:8784, THE COLOUR OF OUTER SHEATH
SHALL BE THE SAME AS OF -Ve CONDUCTOR. |
| CONDUCTOR
DETAILS |
|
|
|
|
LOOP
RESISTANCE (OHMS/MTR.)+/-10% @ 20°C |
|
|
|
CROSS SEC. |
CABLE
TYPE |
|
AWG |
DIA (MM) |
AREA MM² |
KX |
VX/KX(A) |
JK |
TX |
SX/RX |
EX |
XK |
|
- |
1.381 |
1.50 |
0.66 |
- |
0.40 |
- |
- |
0.83 |
0.83 |
| 16 |
1.29 |
1.81 |
0.76 |
0.39 |
0.46 |
0.39 |
0.03 |
0.97 |
0.97 |
| 18 |
1.02 |
0.823 |
1.21 |
0.62 |
0.75 |
0.62 |
- |
1.52 |
1.52 |
| 20 |
0.81 |
0.50 |
1.98 |
0.97 |
1.20 |
0.97 |
0.08 |
2.50 |
2.50 |
| 20 |
7X0.31 |
0.50 |
1.98 |
0.97 |
1.20 |
0.97 |
0.08 |
2.50 |
2.50 |
