2640A/2645A NetDAQ
Users Manual
2-8
5. Close the module cover, secure the screws, and insert the module in the
connector at the rear of the instrument until it latches in place.
Resistance and RTD measurements use two terminals (one channel) or four
terminals (two channels). The 4-wire connection provides increased accuracy over
the 2-wire connection. Refer to Figure 2-5 for examples of 2-wire and 4-wire
connections. (The 2645A does not allow two-wire RTD measurements.)
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