Strasbaugh nTellect 7AF - Ad17 T

138 Pamux User’s Guide
AD17T TYPE R OR TYPE S THERMCOUPLE
This thermocouple input can be used as either Type R or Type S, depending on the wire it is connected
with. The algorithm for both types of thermocouples is the same:
B = VALUE% * 2.43663
TEMP = A0 + (A1 * B) + (A2 * B
2
) +(A3 * B
3
) + (A4 * B
4
)
where A0, A1, A2, A3, and A4 depend on VALUE% and can be derived from the tables below.
When used as a Type R thermocouple:
VALUE% Coefficients Temp Range (°C)
< 740
A0 = 0
-50 to 237
A1 = 0.1625144
A2 = -2.045438 x 10-5
A3 = 2.540494 x 10-9
A4 = -1.17679 x 10-13
>
740
A0 = 46.67453
237 to 1768
A1 = 0.1117991
A2 = -2.565926 x 10-6
A3 = 5.347317 x 10-11
A4 = 0
When used as a Type S thermocouple:
VALUE% Coefficients Temp Range (°C)
< 479
A0 = 0
-50 to 167
A1 = 0.1641405
A2 = -2.024176 x 10-5
A3 = 2.784973 x 10-9
A4 = -1.41721 x 10-13
>
479
A0 = 30.1319
167 to 1768
A1 = 0.1215561
A2 = -2.752449 x 10-6
A3 = 6.475822 x 10-11
A4 = 0
TEMPERATURE CONVERSIONS ROUTINES