4 thermocouple input mode, Thermocouple input mode, Figure 3-5 – ADLINK USB-2401 User Manual

Page 41: Full bridge and half bridge connection, Operation 31

Text mode
Original mode

Operation

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:

The CJC temperature sensor is housed in the USB-2401 and
requires 15 minutes’ warmup to stabilize.

MUX

DC 2.5V

20k

EXC

SC+

SC-

GND

USB-2401