Campbell CR1000 User Manual

Section 5. System Overview
• Edge timing
o Resolution — 540 ns
Note A period-averaging sensor has a frequency output, but it is connected to a
SE terminal configured for period-average input and measured with the
PeriodAverage() instruction (see section Period Averaging — Overview
(p. 70) ).
5.1.3.1 Pulses Measured
Pulse outputs vary. These variations are illustrated in the figure Pulse-Sensor
Output-Signal Types
(p. 69).
Figure 23. Pulse-Sensor Output-Signal Types
5.1.3.2 Pulse-Input Channels
Table Pulse-Input Channels and Measurements (p. 69) lists devices, channels and
options for measuring pulse signals.
Table 3. 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.
646)
module
• High-frequency
• Switch-closure
• Counts
• Frequency
• Running
average of
frequency
• Interval
• Period
• State
PulseCount()
TimerIO()
69

Campbell CR1000 Specifications

General

Power Requirements	9.6 to 16 VDC
Data Logger Operating System	CRBasic
Memory	4 MB
Analog Inputs	16 single-ended or 8 differential
Analog Input Resolution	13 bits
Analog Input Range	+/-2.5V
Digital I/O	8
Pulse Counters	2
Communication Ports	RS-232
Operating Temperature	-25°C to +50°C
Pulse Channels	4