Advantech 4718 - Manual (Page 40)

USB-4718 User’s Manual 34
Appendix A Specifications
A.1 Analog Input
A.2 Accuracy for Thermocouple:
NOTE: Due to the location of the CJC sensor, the measurement will have
a 1°C max. difference in channels.
Table A.1: Analog Input
Channels 8 differential
Input type mV, V, and mA
Input range J, K, T, E, R, S and B Thermocouple
Uni-polar
0~15mV, 0~50mV, 0~100mV,
0~500mV, 0~1V, 0~2.5V, 0~20mA,
4~20mA
Sampling rate 10 samples/s(total)
Accuracy ±0.1% or better (voltage and current input)
Zero drift ±0.3 uV / °C
Span drift ±25 ppm / °C
CMR @ 50/60 Hz 92 dB
Input impedance 1.8 M
Table A.2: Accuracy for Thermocouple
Input Range Typical Accuracy Maximum Error
J thermocouple 0 to 760 °C ±1.0 °C ±1.5 °C
K thermocouple 0 to 1370 °C ±1.0 °C ±1.5 °C
T thermocouple -100 to 400 °C ±1.0 °C ±1.5 °C
E thermocouple 0 to 1000 °C ±1.0 °C ±1.5 °C
R thermocouple 500 to 1750 °C ±1.2 °C ±2.5 °C
S thermocouple 500 to 1750 °C ±1.2 °C ±2.5 °C
B thermocouple 500 to 1800 °C ±2.0 °C ±3.0 °C