West Control Solutions ProVU 4 - Manual (Page 25)

ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
Page 24 Wiring Instructions 59407, Issue 1 – March 2008
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:
Table 2. Thermocouple Extension Wire Colours
Type International
IEC584-3
USA ANSI
MC 96.1
British
BS1843
French
NFC 42-324
German
DIN 43710
+* Black White Yellow Yellow Red
J
- White
Black
Red
Black
Blue
Black
Black
Black
Blue
Blue
+ Brown Blue White Yellow Red
T
- White
Brown
Red
Blue
Blue
Blue
Blue
Blue
Brown
Brown
+ Green Yellow Brown Yellow Red
K
-* White
Green
Red
Yellow
Blue
Red
Purple
Yellow
Green
Green
+ Pink Orange Orange
N
- White
Pink
Red
Orange
Blue
Orange
+ Grey Grey Red
B
- White
Grey
Red
Grey
Grey
Grey
+ Orange Black White Yellow Red
R & S
- White
Orange
Red
Green
Blue
Green
Green
Green
White
White
+ White
C (W5)
- Red
White
Note:
* = Wire is magnetic
+ Wire
- Wire
Sheath