Campbell CR23X Bedienungsanleitung Seite 2

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Design Features
The CR23X measures most sensor types directly, communi-
cates via modems, reduces data, controls external devices, and
stores both data and programs in either non-volatile Flash
memory or battery-backed SRAM. The standard 2 Mbyte
memory stores 1,000,000 data points in two final storage areas.
With the 4 Mbyte option, the CR23X can store over 2 million
data points.
Two operating system options are available. The array-based
operating system stores arrays of data at specified intervals or
when some other set condition has been met. The table-based
operating system allows you to group and store like data in
separate tables.
The CR23X contains a comprehensive set of measurement,
processing, and output instructions for programming the data-
logger. Measurement instructions specific to bridge configura-
tions, voltage outputs, vibrating wire sensors, SDI-12 sensors,
thermocouples, Synchronous Devices for Measurement
(SDMs), and multiplexers are standard. Processing instruc-
tions support algebraic, statistical, and transcendental func-
tions for on-site processing. Output instructions control exter-
nal devices and process data over time. These instructions
include averages, maximums, minimums, standard devia-
tions, histograms, and FFTs.
The maximum rate the CR23X can execute its program is 100
times per second. The maximum rate a single input can be
measured is 1,500 samples per second. A battery-backed clock
assures accurate timekeeping.
24-Character-by-2-Line
Alphanumeric Display facili-
tates viewing labeled real-time
and historical data, program
instructions, and help menus.
System Description
The CR23X Micrologger is a compact, rugged, powerful datalogger. Housed in a portable, self-contained package, the
Micrologger consists of measurement and control electronics, communication ports, keyboard, display, power supply,
and carrying handle. Minimum power requirements allow extended field use from a dc voltage source.
Computer RS-232 provides a 9-pin optically
isolated DCE port.
Charger Input connects to a
charging source (rechargeable
battery base option only).
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16-Character Keyboard allows
on-site editing of CR23X
programs and manual entry of
commands or data.
Removable Power
Te rm in al simplifies connection
to external power supply.
Power Switch allows you to
turn the power on or off
(alkaline and rechargeable
base options only).
CS I/O Port connects to data
transfer and storage peripher-
als such as phone, RF, short
haul modems, and storage
modules.
Input/Output Connections
measure, communicate with,
and power sensors and
peripherals.
{
Cover photos (CR23X applications): From top, Eddy covariance
systems, Automotive performance testing, Weather station installa-
tion, Geotechnical monitoring.
2
Input/Output Connections
Analog Inputs
Twenty-four single-ended (12 differential) channels
measure voltage levels with 15-bit resolution on five
software selectable voltage ranges.
Pulse Counting Channels
The CR23X has four 8-bit (two 16-bit) pulse channels
for measuring switch closures, low-level ac pulses, and
high frequency pulses.
Digital Input/Output Ports
The CR23X has eight digital input/output control ports.
All of the ports can be used for output control and to sense
the status of external devices. Three of these ports can read
SDM peripherals and four of them can be configured as
pulse counters or interrupt inputs.
Continuous Analog Outputs
Two continuous analog outputs with 15-bit resolution
provide voltage levels to strip chart recorders or propor-
tional controllers.
Switched Excitation Outputs
Four outputs provide precision excitation voltages for resis-
tive bridge measurements. The excitation is programmable
over a ±5000 mV range.
Power Connections
The continuous 5 V and 12 V terminals are for connecting
sensors and non-CSI peripherals. The switched 12 V termi-
nal is program controlled.
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