User manual

Chapter 5 Transducer Conversion Functions
© National Instruments Corporation 5-11 NI-DAQ User Manual for PC Compatibles
Table 5-1 shows the valid temperature ranges and accuracies for the inverse
equations used for each thermocouple type. The errors listed in the table
refer to the equations only; they do not take into consideration the accuracy
of the thermocouple itself, the SCXI modules, or the DAQ device that is
used to take the voltage reading.
.
Table 5-1.
Temperature Error for Thermocouple Inverse Equations
Thermocouple
Type
Temperature Range Error
B 250 to 700 °C
700 to 1,820 °C
–0.02 to +0.03 °C
–0.01 to +0.02 °C
E –200 to 0 °C
0to1,000°C
–0.01 to +0.03 °C
±0.02 °C
J –210 to 0 °C
0to760°C
760 to 1,200 °C
–0.05 to +0.03 °C
±0.04 °C
–0.04 to +0.03 °C
K –200 to 0 °C
0to500°C
500 to 1,372 °C
–0.02 to +0.04 °C
–0.05 to +0.04 °C
–0.05 to +0.06 °C
N –200 to 0 °C
0to600°C
600 to 1,300 °C
–0.02 to +0.03 °C
–0.02 to +0.03 °C
–0.04 to +0.02 °C
R –50 to 250 °C
250 to 1,200 °C
1,200 to 1,664.5 °C
1,664.5 to 1,768.1 °C
±0.02 °C
±0.005 °C
–0.0005 to +0.001 °C
–0.001 to +0.002 °C
S –50 to 250 °C
250 to 1,200 °C
1,200 to 1,664.5 °C
1,664.5 to 1,768.1 °C
±0.02 °C
±0.01 °C
±0.0002 °C
±0.002 °C
T –200 to 0 °C
0to400°C
–0.02 to +0.04 °C
±0.03 °C