National Instruments SCC-TC01 用户手册

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 is thermocouple voltage.

 is E Series DAQ device voltage.

This step provides proper scaling for the thermocouple amplifier in the 
SCC-TC0X.

2.

Measure the reference-junction (cold-junction) temperature.

a.

Read the thermistor voltage [ACH(X

+8)].

b.

Convert the thermistor voltage to cold-junction temperature using 
the formula in the 

section.

3.

Calculate the cold-junction compensation voltage by converting the 
cold-junction temperature you got in step 2 to a thermocouple voltage. 
Use the polynomial expressions applicable to the type of thermocouple 
you are using.

4.

Apply the cold-junction compensation to the thermocouple reading 
by adding the cold-junction compensation voltage you got in step 3 
to V

.

5.

Calculate the thermocouple temperature by converting the voltage 
result you got in step 4 to a temperature. Use the polynomial 
expressions applicable to the type of thermocouple you are using. 
This calculation gives you a linearized temperature measurement.

Polynomials come from NIST Monograph 175.

These specifications are typical at 25 °C unless otherwise stated.

Number of input channels ...................... 1 DIFF

Input signals ........................................... Thermocouples of types B, E, J, 

K, N, R, S, and T

Input signal range

................................... ±100 mV

Input impedance ..................................... 10 M

Ω powered on,

10 k

Ω powered off or overload

Bandwidth .............................................. 2 Hz