Spectrum-controls 1746sc-NI8u Manual de usuario descargar pdf (Pagina 89)

Appendix A: Module Specifications 77

The diagrams that follow for each thermocouple type, give data for a

sample module over the input range of the thermocouple, over

temperature. Thermocouples are usually parabolic in their µV to degrees

C curves. Normally, at the ends of any given thermocouple range, the

ratio of change in temperature increases as a result of a change in voltage.

In other words, at the ends, a smaller change in voltage results in a larger

change in degrees.

Thermocouple Type J, Example Deviations

-0.35

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

-210 -110 -10 90 190 290 390 490 590 690 790

Degrees C TC Input

Degrees C Deviation

Ch 2 Delta, 25C

Ch 2 Delta, 0C

Ch 2 Delta, 60C

Thermocouple Type K, Example Deviations (Low Range)

-0.5

0

0.5

1

1.5

2

2.5

3

-270 -260 -250 -240 -230 -220 -210 -200

Degrees C TC Input

Degrees C Deviation

Ch 2 Delta, 25C

Ch 2 Delta, 0C

Ch 2 Delta, 60C

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 129 130

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