Decagon Devices SRS - Connecting the SRS; Connecting to Decagon Data Logger

SRS Sensors 4 CONNECTING THE SRS
4 Connecting the SRS
4.1 Connecting to Decagon Data Logger
The SRS is most easily used with Decagon’s Em50, Em50R and
Em50G loggers (firmware version 2.13 or later). SRS sensors can
also be used with other SDI-12 enabled data loggers, such as those
from Campbell Scientific, Inc. The SRS requires an excitation volt-
age in the range of 3.6 to 15 volts.
To download data to your computer from an Em50 series logger, you
will need to install ECH
2
O Utility or DataTrac 3 on your computer.
The following software supports the SRS sensor:
Em50 Firmware version 2.14 or greater
ECH
2
O Utility 1.68 or greater
DataTrac 3.8 or greater
ProCheck 1.51 or greater
Note: Please check your software version to ensure it will support
the SRS.
To update your software to the latest versions, please visit Decagon’s
support site at http://www.decagon.com/support/.
To use the SRS with your Em50 series data logger, simply plug the
stereo plug into one of the five ports on the data logger and use either
ECH
2
O Utility, or DataTrac 3 software (see respective manuals) to
configure that port for the SRS and set the measurement interval.
The highest logging frequency for the Em50 and Em50R data loggers
is one minute and for the Em50G logger it is five minutes. When
you set the logging interval to greater than one minute on any of the
Em50 seiries loggers, reported readings are automatically averaged
using data sampled from the sensor at one minute intervals. Users
need to be cautious when choosing a sampling interval with SRS
sensors connected to an Em50 series logger, so that the averaging
feature does not result in erroneous measurement. For example, if
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