Rockwell Automation 1746-INT4 Thermocouple/MV Isolated/ User Manual - Manual (Page 102)

Publication 1746-UM614B-EN-P - September 2007
102 Thermocouple Descriptions
C and D Type
Thermocouples
C (tungsten-5% rhenium versus
tungsten-26% rhenium)
D (tungsten-3% rhenium versus
tungsten-25% rhenium)
Types C and D thermocouples are recommended for use in the
temperature range from 0
… 2320 °C (32…4208 °F) in non-oxidizing
inert atmospheres. They are not practical for use below 399 °C
(750 °F). Beware of embrittlement.
C and D Thermocouple Recommended Use
Code Color Code Max Useful Temp.
Range EMF Over
Useful Range Std. Limits
of Error
C Jacket:
wht-red trace
+ = wht, - = red TC grade:
0…2320 °C
(32…4208 °F)
Ext grade:
0…870 °C)
(32…1600 °F) 0…37.066 mV 4.5…450 °C
(40.1…842 °F)
1.0% to
2320 °C
(4208 °F)
D Jacket:
wht-yel trace
+ = wht, - = red TC grade:
0…2320 °C
(32…4208 °F)
Ext grade:
0…260 °C (32…500 °F) 0…39.506 mV 4.5…450 °C
(40.1…842 °F)
1.0% to
2320 °C
(4208 °F)