4
Data Storage and Retrieval Options
To determine the best option for an application, consider the accessibility of the site, availability of services (e.g., cellular phone or
satellite coverage), quantity of data to collect, and desired time between data-collection sessions. Some communication options can
be combined—increasing the exibility, convenience, and reliability of the communications.
PC Cards or CF Cards
e CR5000 can store data and programs on a PC
card or CF card. e card can then be carried to a
computer. e computer directly reads PC cards via
its PCMCIA card slot. CF cards are read using either a
CF1 adapter or the 17752 Reader/Writer. Please note
that the CF card should be industrial-grade with a
storage capacity of 2 GB or less.
Direct Links
A PC or laptop can be connected directly to the data-
logger’s RS-232 port (no interface required). is port
provides optical isolation. Alternatively, the PC or
laptop can be connected to the CR5000’s CS I/O port
via an SC32B or SC-USB interface.
Keyboard Display
e CR5000’s integrated keyboard display is used to
program the datalogger, manually initiate data trans-
fer, and display data. It displays 8 lines x 21 characters
(64 x 128 pixels) and has a 16-character keyboard.
Custom menus are supported allowing customers to
set up choices within the datalogger program that can
be initiated by a simple “toggle” or “pick list”.
Ethernet
e NL100 interface enables a CR5000 datalogger
to communicate over a local network or a dedicated
Internet connection via TCP/IP.
Short Haul Modems
e SRM-5A RAD Short Haul Modem supports com-
munications between the datalogger and a PC via a
four-wire unconditioned line (two twisted pairs).
Multidrop Interface
e MD485 intelligent RS-485 interface allows a
PC to address and communicate with one or more
dataloggers over a single two-twisted-pair cable.
Distances up to 4000 feet are supported.
Spread Spectrum Radios
Spread spectrum radios provide communications
between a base station computer and several eld sites
over short distances. Line-of-sight is required.
Telephone Networks
e CR5000 can communicate with a PC using land-
lines, cellular CDMA, or cellular GPRS transceivers.
Telephone networks can be combined with spread
spectrum radios, multidrop modems, and Ethernet
interfaces, which extends the distance between data-
logger and PC.
Satellite Transmitters
Our NESDIS-certi ed GOES satellite transmitter sup-
ports one-way communications from a Data Collection
Platform (DCP) to a receiving station.
The CF1 adapter (at left) allows the PCMCIA slot in the CR5000
datalogger to receive CF cards. Campbell Scienti c o ers
256 Mbyte, 1 Gbyte (shown at right ), and 2 Gbyte industrial-
grade CompactFlash cards to be used with the CF1.
A GOES satel-
lite system
transmits
data from a
weather sta-
tion on Nevado
Sajama, Bolivia,
to climate re-
searchers in the
United States.
(6 pagine)
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