Campbell Scientific CR1000 Measurement and Control System - Manual (Page 39)

Section 4. Quickstart Tutorial
39
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()
4.1.3.3.3 Pulse Sensor Wiring
Wiring a pulse sensor to a CR1000 is straight forward, as shown in figure Pulse-
Input Wiring -- Anemometer Switch
(p. 40).
Pulse sensors have two active wires,
one of which is always ground. Connect the ground wire to a (ground)