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4.11 Thermocouple Measurements
The OM-DAQ-USB-2401 provides effortless thermocouple (TC) measurements.
The unit includes built-in cold-junction compensation (CJC), which is
automatically invoked when you select TC measurements. The DAQ unit
automatically converts acquired voltage readings into compensated-linearized
temperature readings. A DAQ system can make thermocouple and volts
measurements concurrently.
TIP: If you experience noise from thermocouple wires, you can connect a 100K
resistor from AxL to the COM to elimate some noise. Please reference the
following diagram:
Figure 4-28. Thermocouple Wiring
Software
4
4-18
V
3
V
3+
V
3-
A
2
L
A
2
H
C
O
M
A
1
L
A
1
H
100K
CONNECT A 100K RESISTER
TO ELIMATE SOME
THERMOCOUPLE INPUT NOISE