Campbell Scientific CR1000 Measurement and Control System - Manual (Page 38)

Section 4. Quickstart Tutorial
38
Figure 5: Half-bridge wiring -- wind vane potentiometer
Figure 6: Full-bridge wiring -- pressure transducer
4.1.3.3 Pulse Sensors
Pulse sensors are measured on CR1000 pulse-measurement channels. The output
signal generated by a pulse sensor is a series of voltage waves. The sensor
couples its output signal to the measured phenomenon by modulating wave
frequency. The CR1000 detects each wave as the wave transitions between
voltage extremes (high to low or low to high). This is termed “state transition”.
Measurements are processed and presented as counts, frequency, or timing data.
Note A period-averaging sensor has a frequency output, but it is connected to a
single-ended analog input channel and measured with the PeriodAverage()
instruction (see Period Averaging
(p. 322)
).