Campbell Scientific CR1000 Measurement and Control System - Manual (Page 330)

Section 8. Operation
330
cutting the output voltage of sensors to voltage levels compatible with the
CR1000, modules for completion of resistive bridges, and shunt modules for
measurement of analog-current sensors. Refer to the appendix Signal
Conditioners
(p. 561)
for information concerning available TIM modules.
8.2.7 Vibrating Wire
Vibrating wire modules interface vibrating-wire transducers to the CR1000. Refer
to the appendix Pulse / Frequency Input-Expansion Modules
(p. 560)
for information
concerning available vibration-wire interface modules.
8.2.8 Low-level ac
Low-level ac input modules increase the number of low-level ac signals a
CR1000 can monitor by converting low-level ac to high-frequency pulse. Refer to
the appendix Pulse / Frequency Input-Expansion Modules
(p. 560)
for information
concerning available pulse-input modules.
8.3 Memory and Final Data Storage
8.3.1 Storage Media
CR1000 memory consists of four non-volatile storage media:
• Internal battery-backed SRAM
• Internal flash
• Internal serial flash
• External flash (optional flash USB: drive)
• External CompactFlash
® optional CF card and module (CRD: drive)
Table CR1000 Memory Allocation
(p. 330)
and table CR1000 SRAM Memory
(p. 331)
illustrate the structure of CR1000 memory around these media. The CR1000
utilizes and maintains most memory features automatically. However, users
should periodically review areas of memory wherein data files, CRBasic program
files, and image files reside. Review and management of memory are
accomplished with commands in the datalogger support software
(p. 77)
File
Control
(p. 454)
menu.
Table 75. CR1000 Memory Allocation
Memory
Sector
Comments
Internal battery-backed
SRAM
1
4 MB*
See table CR1000 SRAM Memory (p. 331) for detail.
Internal Flash 2
2 MB
Operating system