Sequoia LISST-100X, Руководство пользователя

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6 LISST-100X User’s Guide
Battery Life
The primary power source for the LISST-100X is a custom alkaline
D-cell battery-pack. The battery pack in NON-rechargeable and
o9 V. It has a room-temperature capacity of 42 A-hr. When
the instrument is in stand-by mode the current drain is 8.5 mA. In
Low Power Sleep mode the current drain drops to 120 µA. For
profiling applications, where the instrument is sampling
continuously, the battery pack has about 60 hours of “On” time.
Powering down the instrument between samples can greatly
extend the deployment times. An EXCEL spreadsheet that can
estimate the battery consumption is included with the software on
the Ship Disk you received with your instrument. The spreadsheet
can also be downloaded from Sequoia’s website:
www.SequoiaSci.com , click Library, then Downloads, then LISST-
100X.
For laboratory or tethered usage, a connector is provided on the
endcap to draw power from an external source. The voltages
required from the external power supply are +12 VDC and should
not 15VDC.
NOTE : LISST-100X units shipped after 1
March 2012 will accept up to +24 VDC external power. Cables up
to 50 meters can be provided to supply external power and
communication with the instrument. This can allow real-time
observation of the size distributions.
When not using the LISST-100X, put the instrument into Low
Power Sleep mode to reduce battery drain to about 10 µA. This
is done from the provided software. Make sure the endcap
switch is in the “1” position when in low power sleep.
Auxiliary
Equipment
The instrument is shipped pre-aligned and tested. A small
chamber is provided for obtaining measurements of background
scattered light from optical surfaces. This background is
subtracted from actual particle scattering measurements to obtain
the true particulate scattering. Additionally, small tools used to
open endcaps, spare batteries, and communication cable is
supplied so that a user need only provide a PC running Windows.
Software is provided to communicate with the instrument, schedule
an experiment, offload the data, and invert the measurements to
obtain particle size distribution and volume concentration. For
laboratory use or for monitoring the progress of an experiment, the
software can be used for real-time processing.
Accessories
For extended laboratory applications various chambers are
available, see Appendix I: LISST Accessories on page 126.