Campbell Scientific CR800 and CR850 Measurement and Control Systems - Manual (Page 39)

Section 4. Quickstart Tutorial
39
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. 307)
).
4.1.3.3.1 Pulses Measured
Figure Pulse Sensor Output Signal Types
(p. 39)
illustrates three pulse sensor output
signal types.
Figure 7: Pulse-sensor output signal types
4.1.3.3.2 Pulse-Input Channels
Table Pulse-Input Channels and Measurements
(p. 39)
lists devices, channels and
options for measuring pulse signals.
Table 2. Pulse-Input Channels and Measurements
Pulse-Input
Channel Input Type Data Option
CRBasic
Instruction
P1, P2
• High-frequency
• Low-level ac
• Switch-closure
• Counts
• Frequency
• Run average
of frequency
PulseCount()
C1, C2, C3, C4,
C5, C6, C7, C8
• High-frequency
• Switch-closure
• Low-level ac
(with LLAC4
Low-Level AC
Conversion
Module)
• Counts
• Frequency
• Running
average of
frequency
•
Interval
• Period
• State
PulseCount()
TimerIO()