ADLINK Technology USB-2401, User Manual

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Operation 31
USB-2401
Figure 3-5: Full Bridge and Half Bridge Connection
3.3.4 Thermocouple Input Mode
A thermocouple consists of two different conductors that produce
a voltage proportional to a temperature difference between either
end of the pair of conductors. The USB-2401 uses 78.125mV
input range to acquire the thermocouple signal, and provides a
precision built-in digital temperature sensor for cold junction com-
pensation (CJC). CJC reading is available by software API with
data in °C. The CJC is in the USB-2401 module.
NOTE:
NOTE:
The CJC temperature sensor is housed in the USB-2401 and
requires 15 minutes’ warmup to stabilize.
MUX
DC 2.5V
20k
ƻ
20k
ƻ
EXC
SC+
SC-
GND
USB-2401