Campbell CR1000 User Manual

Section 8. Operation
Table 84. CR1000 Memory Allocation
Internal
Serial Flash
3
512 kB
• Device settings (12 kB) — PakBus address and settings, station name.
Rebuilt when a setting changes.
• CPU:drive (500 kB) — program files, field calibration files, other files not
frequently overwritten. When a program is compiled and run, it is copied
here automatically for loading on subsequent power-ups. Files
accumulate until deleted with File Control or the FilesManage()
instruction. Use USR: drive to store other file types. Available CPU:
memory is reported in Status table field CPUDriveFree.
• FAT32 file system
• Limited write cycles (100,000)
• Slow serial access
External Flash
(Optional)
2 GB: USB: drive
USB: drive (p. 653) — Holds program files. Holds a copy of requested final-memory
table data as files when TableFile() instruction is used. USB: data can be retrieved
from the storage device with Windows Explorer. USB: drive can facilitate the use of
Powerup.ini.
External CompactFlash
(Optional)
≤ 16 GB: CRD: drive
CRD: drive (p. 653) — Holds program files. Holds a copy of final-storage table data as
files when TableFile() instruction with Option 64 is used (replaces CardOut()). See
Writing High-Frequency Data to Memory Cards (p. 205) for more information. When
data are requested by a PC, data first are provided from SRAM. If the requested records
have been overwritten in SRAM, data are sent from CRD:. Alternatively, CRD: data
can be retrieved in a binary format using datalogger support software (p. 95) File
Control. Binary files are converted using CardConvert software. 10% or 80 kB of CF
memory (whichever is smaller) is reserved for program storage. CF cards can facilitate
the use of Powerup.ini.
1
SRAM
∙CR1000 changed from 2 to 4 MB SRAM in Sept 2007. SNs ≥ 11832 are 4 MB.
2 Flash is rated for > 1 million overwrites.
3
Serial flash is rated for 100,000 overwrites (50,000 overwrites on 128 kB units). Care should be taken in programs that
overwrite memory to use the CRD: or USR: drives so as not to wear-out the CPU: drive.
∙The CR1000 changed from 128 to 512 kB serial flash in May 2007. SNs ≥ 9452 are 512 kB.
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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