Resistance Measurements - Campbell CR300 Series Product Manual

Sensor Type
3-wire transmitter using external power
4-wire transmitter using data logger power
4-wire transmitter using external power

14.3 Resistance measurements

Bridge resistance is determined by measuring the difference between a known voltage applied to
the excitation (input) of a resistor bridge and the voltage measured on the output arm. The data
logger supplies a precise voltage excitation via VX terminals. Return voltage is measured on
Connection Example
14. Measurements 72