Campbell CR800 Specifications download pdf (Page 14)

CR800 and CR850 Overview

OV1.3 Power Supply and AC Adapter

The CR800 requires a separate 12 V power supply. The PS100 power supply

has a 7 amp hour battery with built in charging regulator. Optional adapters

for AC power are available. Charging power can also come from a 17-28

VDC input such as a solar panel.

OV2. Memory and Operating Concepts

OV2.1 Memory

The CR800 has 2 MB Flash EEPROM that is used to store the Operating

System. Another 128 K of Flash is used to store configuration settings. A

minimum of 4 MB SRAM is available for program storage (16K), operating

system use, and data storage. The size of available memory may be seen in the

status file.

In September 2007, Campbell Scientific began increasing the

SRAM size from 2 MB to 4 MB. Dataloggers with a serial

number greater than or equal to 3605 will have a 4 MB SRAM.

The 4 MB dataloggers will also have a sticker stating “4M

Memory”.

NOTE

OV2.2 Programming

The CR800 program directs how and when the sensors are measured and data

are stored. The program is created on a computer and sent to the CR800. The

CR800 can store a number of programs in memory. Campbell Scientific has

two software applications that create CR800 programs: ShortCut and the

CRBasic Editor.

For many applications ShortCut is a good place to start. With ShortCut you

select the sensors to measure, the units to report the measurements in, and the

data to output. ShortCut supports most of the sensors sold by Campbell

Scientific as well as generic measurements. The CR800 programs created by

ShortCut are generally clear and provide a good example of CRBasic code for

those who wish to write CR800 programs themselves.

For those that have the need or inclination to tackle more complex programs,

the CRBasic Editor is used to create and edit the CRBasic programs that the

CR800 runs. Section 4 provides an introduction to CRBasic Programming.

The CRBasic Editor has syntax highlighting and online help for the CR800

instruction set described in Sections 5-12.

ShortCut is included with PC200, PC400 and LoggerNet and is available for

free from the Campbell Scientific web site. The CRBasic Editor is included in

PC400 and LoggerNet.

OV-6

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Campbell CR800 Specifications Page 14