comPensaTinG caBles
To ensure proper temperature measure-
ment, please note the following.
When connecting the hot (measuring)
junction to the cold (reference) junction
in the control unit, make sure you use
a compensating cable whose wires are
made of original thermocouple material.
Explanation: Wires made of original
thermocouple material exhibit the
same thermoelectric behavior as the
thermocouple pair at the hot junction.
As a result, the thermocouple voltage
remains constant all the way to the cold
junction in the control unit.
This cold junction compensation is
necessary, since thermocouples measure
the temperature difference between the
hot junction and the cold junction (see
diagram on right). This helps to prevent
parasitic thermocouple voltages.
Thermocouples
extension / compensating cables
Overview
* Type J is used for männer thermocouples.
Thermocouple
T
e
K
n
u
l
Type material
IEC 60584
DIN IEC 584
DIN 43710
BC 4937
see lX
see uX
Color coding
not specified
Color coding
not specified
rX/sX
BX
JX
TX
eX
KX
VX
nX
r
s
B
J
Iron
Copper-nickel
Copper
Copper-nickel
Nickel-chromium
Copper-nickel
uX
lX
soPtrh/
soPt
sX
BX
JX
TX
eX
KX
VX
JX/Jc
TX/Tc
eX/ec
KX/Kc
Bc
sc
Vc
Wc
NF-C 42-324
ANSI MC 96.1
rca/sca
rcB/scB
Bc
JX
TX
eX
nX/nc
KX
KcB
Kca
NiCr
Ni
Fe
CuNi
Insulated
thermocouple wire
Measuring unit
of hot runner
control system
Compensating
wire
Plug connector or
direct connection
Cold junction
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
Nickel-chromium
Nickel
Nickel-chromium-silicon
Nickel-silicon
Copper
Copper-nickel
Iron
Copper-nickel
Platinum/20% Rhodium
Platinum/6% Rhodium
Platinum/13% Rhodium
Platinum
Platinum/10% Rhodium
Platinum
