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Campbell Scientic Australia Pty. Ltd (07) 4772 0444
The CR800 and CR850 dataloggers provide precision measurement capabilities in a rugged, battery-operated package. Both
models consist of measurement electronics encased in a plastic shell and an integrated wiring panel. The standard operat-
ing range is -25° to +50°C. An extended range of -55° to +85°C for the CR800 or -30°to +80°C for the CR850 is also available.
CR800 Series Measurement & Control System
*Campbell Scientic is increasing the data storage memory from 2 Mbytes to 4 Mbytes. Dataloggers with a serial number greater than or
equal to 3605 will have a 4 Mbyte memory. The 4 Mbyte dataloggers will also have a sticker on the canister stating “4M Memory”.
Input/Output Connections
Individually congured for
ratiometric resistive bridge,
thermocouple, switch clo-
sure, high frequency pulse,
low-level ac, serial sensors,
and more.
{
Removable Power Terminal—
simplies connection to external
power supply.
RS-232
Provides a 9-pin DCE port
for connecting a battery-
powered laptop, serial sen-
sors or RS-232 modems.
CS I/O Port
Connects with AC-powered
PCs and communication
peripherals such as phone,
RF, short-haul, and
multidrop modems.
Features
• 4 Mbytes* of battery-backed SRAM
• Program execution rate of up to 100 Hz
• CS I/O and RS-232 serial ports
• 13-bit analog to digital conversions
• 16-bit microcontroller with 32-bit internal CPU
architecture
• Temperature compensated real-time clock
• Background system calibration for accurate
measurements over time and temperature
changes
• Single DAC used for excitation and measurements
to give ratiometric measurements
• Gas Discharge Tube (GDT) protected inputs
• Data values stored in tables with a time stamp and
record number
• Battery-backed SRAM and clock that ensure data,
programs, and accurate time are maintained while
a CR800-series datalogger is disconnected from
the main power source
• One program-status LED
• Serial communications with serial sensors and
devices supported via I/O port pairs
• PakBus, Modbus, and DNP3 protocols supported
Model Descriptions
The models dier in their keyboard display. The CR800 uses an
external keyboard display, the CR1000KD, which connects to the
CR800 via its CS I/O port. The CR850 includes an on-board
keyboard display as part of its integrated package.
Operating System/Logic Control
The on-board operating system includes measurement, process-
ing, and output instructions for programming the datalogger. The
programming language, CRBasic, uses a BASIC-like syntax. Meas-
urement instructions specic to bridge congurations, voltage
outputs, thermocouples, and pulse/frequency signals are included.
Processing instructions support algebraic, statistical, and transcen-
dental functions for on-site processing. Output instructions process
data over time and control external devices.
Storage Capacity*
The CR800 series has 2 Mbytes of FLASH memory for the Operat-
ing System, and 4 Mbytes of batterybacked SRAM for CPU usage,
program storage, and data storage. Data is stored in a table format.
(26 strony)
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