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Chapter 2
Operating the NI 435x Device
©
National Instruments Corporation
2-21
Figure 2-9.
Thermistor Measurement
Refer to Figure 2-10 for an example of how you can use different
transducers connected to analog channels in the same measurement setup.
Note
Use the 25
µ
A current source for thermistors above 1 k
Ω
to avoid self-heating. Refer
to the
section for further details.
Connecting the Resistor
You can use signal connection techniques, described in the
section and the
section, for any resistor as
well.
The NI 435
x
accessories—the TBX-68T, CB-68T, and TBX-68 for the
NI 435
x
for USB, PXI, and PCI—are designed to be used with RTDs,
thermistors, and resistors. Consult the accessory installation guide for
instructions on how to connect the resistors. Figures 2-10 and 2-11 show
examples of how to use different transducers connected to analog channels
in the same measurement setup.
I
EX+
or I
EX0+
Rt
CH+
CH–
I
EX–
or I
EX0–
I
EX