Temperature - Electromotive Force (EMF) Tables
for Non-Letter Designated Thermocouples 1
Table 19 ¾ Initial Limits of Error for Thermocouples
Temperature Range
Tolerances-Reference Junction 0°C (32°F)
Standard Tolerances Special Tolerances
Type
°C °F °C
°F °C
°F
C
0 to 400
32 to 750
±4.5
Note 1
n/a
Note 1
C
400 to 2315
750 to 4200
±1.0 %
n/a
M
-50 to 277
-58 to 530
±2.2
±1.1
M
277 to 1410
530 to 2570
±0.75 %
±0.4 %
P
0 to 1395
32 to 2543
±1.0 %
n/a
Note 1 ¾ The Fahrenheit tolerance is 1.8 times larger than the °C tolerance at the equivalent °C temperature. Note particularly
that percentage tolerance apply only to temperature that are expressed in °C
Table 20 ¾ Recommended Upper Temperature Limits for Thermocouples
Upper Temperature limit for Various Wire Gage Sizes (Awg). °C (°F)
Type 8 Gage 18 Gage 20 Gage
24 Gage 28 Gage
C
2315 (4200)
2315 (4200)
2315 (4200)
M
1260 (2300)A
1204 (2200)A
P
1250 (2280)
1250 (2280)
1250 (2280)
A
Note that the upper temperature limits only apply in a protected sheath
Page 1
This reference manual consists of reference
tables that give temperature-electromotive force (emf)
relationships for Pyromation, Inc. Types C, M, and P
thermocouples. These are not ANSI reconized coded
thermocouple types
These tables give emf values to three decimal
places (1 uV) for each degree of temperature. Such
tables are satisfactory for most industrial uses but
may not be adequate for computer and similar
applications. If greater precision is required, the
reader should contact the manufacturer for equations
which permit easy and unique generation of the
temperature-emf relationship.
1 All temperature - electromotive force data in
Tables 21 to 26 have been developed from wire
manufacturers data. The data in these tables are
based upon the International Temperature Scale of
1990 (ITS-90).
List of Tables
Following is a list of the thermocouple tables
included in this reference manual.
Table
Type
Range
19 Limits of error
20
Recommended upper temperature
limits for protected thermocouples
21
C W,5%Re - W,26%Re
0 to 2315 °C
22
C W,5%Re - W,26%Re
32 to 4200 °F
23
M Ni - Ni,18%Moly
-50 to 1410 °C
24
M Ni - Ni,18%Moly
-58 to 2570 °F
25
P Platinel II
0 to 1395 °C
26
P Platinel II
32 to 2543 °F