Sensor Placement (Thermocouple Or Rtd); Thermocouple Wire Identification Chart; Table 2. Thermocouple Extension Wire Colours - WEST P8700 User Manual

Sensor Placement (Thermocouple or RTD)

If the temperature probe is to be subjected to corrosive or abrasive conditions, it must be
protected by an appropriate thermowell. The probe must be positioned to reflect true process
temperature:
1. In a liquid media - the most agitated area
2. In air - the best circulated area
CAUTION:
The placement of probes into pipe work some distance from the heating vessel
leads to transport delay, which results in poor control.
For a two wire RTD a wire link should be used in place of the third wire. Two wire RTDs must
only be used with lead lengths less than 3 metres. Use of three wire RTDs is strongly
recommended.

Thermocouple Wire Identification Chart

The different thermocouple types are identified by their wires colour, and where possible, the
outer insulation as well. There are several standards in use throughout the world.
The table below shows the wire and sheath colours used for most
common thermocouple types. The format used in this table is:
Type International
IEC584-3
+*
Black
J
-
White
+
Brown
T
-
White
+
Green
K
-*
White
+
Pink
N
-
White
+
Grey
B
-
White
+
Orange
R & S
-
White
+
C (W5)
-
Note:
* = Wire is magnetic
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Table 2. Thermocouple Extension Wire Colours

USA ANSI
MC 96.1
White
Black Black
Red
Blue
Brown Blue
Red
Yellow
Green Yellow
Red
Orange
Pink Orange
Red
Grey
Grey Grey
Red
Black
Orange Green
Red
White
White
Red
Connections
1
/ - DIN Controllers & Indicators - Product Manual
16
British French
BS1843 NFC 42-324
Yellow Yellow
Black
Blue Black
White Yellow
Blue
Blue Blue
Brown Yellow
Red
Blue Purple
Orange
Orange
Blue
White Yellow
Green
Blue Green
+
Wire
Sheath
-
Wire
German
DIN 43710
Red
Black Blue
Blue
Red
Blue Brown
Brown
Red
Yellow Green
Green
Red
Grey
Grey
Red
Green White
White
59305, Issue 5 – March 2005