Thermocouple Input Wiring - Brainchild BTC-2500 User Manual

2 6 Thermocouple Input Wiring

2 6 Thermocouple Input Wiring
Thermocouple input connections are shown in Figure 2.5. The correct type of Thermocouple input connections are shown in Figure 2.5. The correct type of
thermocouple extension lead-wire or compensating cable must be used for the entire thermocouple extension lead-wire or compensating cable must be used for the entire
distance between the controller and the thermocouple, ensuring that the correct distance between the controller and the thermocouple, ensuring that the correct
polarity is observed throughout. Joints in the cable should be avoided, if possible. polarity is observed throughout. Joints in the cable should be avoided, if possible.
If the length of thermocouple plus the extension wire is too long, it may affect the If the length of thermocouple plus the extension wire is too long, it may affect the
temperature measurement. A 400 ohms K type or a 500 ohms J type thermocouple temperature measurement. A 400 ohms K type or a 500 ohms J type thermocouple
lead resistance will produce 1 degree C temperature error approximately. lead resistance will produce 1 degree C temperature error approximately.
DIP Switch DIP Switch
The colour codes used on the thermocouple extension leads are shown in Table 2.1. The colour codes used on the thermocouple extension leads are shown in Table 2.1.
Thermocouple Thermocouple
Type Type
Copper ( Cu ) Copper ( Cu )
T
Constantan Constantan
Iron ( Fe ) Iron ( Fe )
Constantan Constantan
J
Nickel-Chromium Nickel-Chromium
K
Nickel-Aluminum Nickel-Aluminum
R R Pt-13%Rh,Pt Pt-13%Rh,Pt
S S Pt-10%Rh,Pt Pt-10%Rh,Pt
B
1 2 3 4 5
8 9 10 11 12 13 14
+
Table 2.1 Thermocouple Cable Colour Codes Table 2.1 Thermocouple Cable Colour Codes
Cable Cable British British
BS BS
Material Material
+ white + white
blue blue
* blue * blue
( Cu-Ni ) ( Cu-Ni )
+ yellow + yellow
blue blue
( Cu- Ni ) ( Cu- Ni )
* black * black
+ brown + brown
( Ni-Cr ) ( Ni-Cr )
blue blue
* red * red
( Ni-Al ) ( Ni-Al )
+ white + white
blue blue
* green * green
Use Use
Pt-30%Rh Pt-30%Rh
Copper Wire Copper Wire
Pt-6%Rh Pt-6%Rh
* Colour of overall sheath * Colour of overall sheath
6 7
American American
ASTM ASTM
+ blue + blue
red red
* blue * blue
+ white + white
red red
* black * black
+ yellow + yellow
red red
* yellow * yellow
+ black + black
red red
* green * green
+grey +grey
red red
* grey * grey
UM25001C
Figure 2.5 Figure 2.5
Thermocouple Input Wiring Thermocouple Input Wiring
German German French French
DIN DIN NFE NFE
+ red + red + yellow + yellow
brown brown blue blue
* brown * brown * blue * blue
+ red + red + yellow + yellow
blue blue black black
* blue * blue * black * black
+ red + red + yellow + yellow
green green purple purple
* green * green * yellow * yellow
+ yellow + yellow
+ red + red
green green
white white
* green * green
* white * white
+red +red
Use Use
grey grey
Copper Wire Copper Wire
* grey * grey
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