2 pulse-input channels, 3 pulse sensor wiring, Figure 8: pulse-sensor output signal types – Campbell Scientific CR3000 Micrologger User Manual
Page 40: Table 2. pulse-input channels and measurements
Section 4. Quickstart Tutorial
40
Figure 8: Pulse-sensor output signal types
4.1.3.3.2 Pulse-Input Channels
Table Pulse-Input Channels and Measurements
(p. 40)
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 CR3000 is straight forward, as shown in figure Pulse-
Input Wiring -- Anemometer Switch
(p. 41).
Pulse sensors have two active wires,
one of which is always ground. Connect the ground wire to a
(ground)
channel. Connect the other wire to a pulse channel. Sometimes the sensor will
require power from the CR3000, so there will be two more wires – one of which
is always ground. Connect power ground to a G channel. Do not confuse the
pulse wire with the positive power wire, or damage to the sensor or CR3000 may