Specifications

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Fig. 2.2: Figure of the Campbell Scientific’s CR200 series datalogger.
tion facilities in Utah, Washington DC, and Canada. They are also the closely partn ered
with other well known companies in the fields of environmental data systems and comput-
ing (e.g., Decagon, Apogee Instruments, and Juniper Systems). Their interests are broad
and they provide over 200 different products. Upon inspection of Campbell’s exhaustive
data logger portfolio, the logger selected as the closest candidate to satisfy the requirements
discussed in section 1.3 is the CR200 series datalogger.
The CR200 series logger, as seen in fig. 2.2, was designed by Campbell to be their
smallest logger and therefore well-suited in cost and size for remote measurements. It can
store up to 32,000 data points and hold six kilobytes of program code. CRBasic or Edlog are
Campbell’s pr ogramming languages that are cross-compiled and sent to the loggers. The
CR200 series uses Campbell’s proprietary PakBus OS that supports addressable networking
through a wired or wireless physical layer. It features five digital or single-ended (SE) analog
ports with 12-bit voltage measurement ports, each with a 0-2500mV maximum range and
0.6mV resolution. It also has two pulse measurement ports, one SDI-12 port, two 2.5V
or 5V excitation ports and one switched port for battery voltage. All units come with
an integrated 12V lead-acid battery charger and a RS-232 communication port. Select
units have integrated 900 MHz and 2.4 GHz ISM spread-spectrum radios (’206, ’211, ’216).
Lastly the device has an ESD rating of 15KV, temperature ratings of -20 and 70 Celsius