Campbell CR3000 Micrologger, Operator'S Manual, Page: 75 / 644

Section 5. Overview
75
FIGURE 23: Pulse Sensor Output Signal Types
5.2.3.2 Pulse Input Channels
Table Pulse Input Terminals and Measurements
(p. 75)
lists devices, channels and
options for measuring pulse signals.
Pulse Input Terminals and Measurements
Pulse Input
Terminal Input Type Data Option
CRBasic
Instruction
P Terminal
•
Low-level ac
•
High-
frequency
•
Switch-closure
•
Counts
•
Frequency
•
Run
average of
frequency
PulseCount()
C Terminal
•
Low-level ac
with LLAC4
(p.
604)
module
•
High-
frequency
•
Switch-closure
•
Counts
•
Frequency
•
Running
average of
frequency
•
Interval
•
Period
•
State
PulseCount()
TimerIO()
5.2.3.3 Pulse Sensor Wiring
Read More See Pulse Measurement Tips
(p. 412).
An example of a pulse sensor connection is illustrated in figure Pulse Input
Wiring Example — Anemometer Switch
(p. 76).
Pulse sensors have two active
wires, one of which is ground. Connect the ground wire to a (signal ground)
terminal. Connect the other wire to a P terminal. Sometimes the sensor will
require power from the CR3000, so there may be two added wires — one of
which will be power ground. Connect power ground to a G terminal. Do not