Sequoia LISST-PORTABLE XR, Руководство пользователя, Страница: 7 / 41

LISST-Portable|XR manual 1
1 Introduction
Dear LISST-P
ORTABLE
|XR Customer:
Thank you for purchasing the LISST-P
ORTABLE
|XR Particle Size Analyzer! This instrument delivers the size distribution and volume
concentration of particles suspended in a liquid. The instrument operates in a stand-alone mode using its internal, rechargeable
battery and touch panel display. The instrument can collect, process, store and display data. Offload the stored data for display in
spreadsheets. Data offloading software (Windows based) is included. The instrument can be powered by an external power supply if
it is used mainly in the laboratory.
The LISST-P
ORTABLE
|XR is extremely simple to operate. All commands and operational modes are accessed using buttons on the
touch panel display. No PC is required, except for offloading data to a computer.
The intent with this manual is to get you started using the LISST-P
ORTABLE
|XR
as quickly as possible. Sequoia’s goal with the LISST-
P
ORTABLE
|XR is to make the user interface so friendly that no manual should be required for normal operation, except as a first-time
introduction to the instrument. During normal operation, most of the questions that the user will want answered can be resolved from
the User’s Guide. This double sided laminated document is attached to the inside lid of the instrument. The front side shows the
general menu structure and the backside has some additional instructions on using the instrument.
The LISST-P
ORTABLE
|XR uses the widely accepted method of laser diffraction to measure the size and concentration of particles
suspended in a carrier liquid. The LISST-P
ORTABLE
|XR employs the full Mie theory in its calculations. The instrument delivers the
concentration of suspended particles (micro-liters/liter, or µl/l) in 44 size classes. The size analysis covers the range from 0.4 to 500
µm. The useful operating range of the instrument is defined based on optical transmission of the sample chamber. For clean, clear
fluids, when the optical transmission exceeds 95%, weak signals from particles result in noisy measurements. On the other end, when
the optical transmission is less than 75%, significant contributions from multiple-scattering bias the size distribution results to lower
sizes. For this reason, the recommended operating range is 75-95% for optical transmission.
Sequoia Scientific, Inc. is pleased that you have chosen one of our products. Thank you! We strive to make our instruments rugged,
reliable, and simple to operate. If you should have any difficulties or questions regarding this product, please feel free to contact your
local distributor or us.