LaMotte 2020wi Portable Turbidity Meters - Manual (Page 51)

GENERAL OPERATING INFORMATION
 OVERVIEW
The 2020we/wi is a portable, microprocessor controlled, direct reading
nephelometer. Turbidity is measured directly by either EPA Method 180.1
or ISO Method 7027. It has a graphical liquid crystal display and six
button keypad. These allow the user to select options from the menu
driven software, to directly read test results or to review stored results of
previous tests in the data logger. The menus can be displayed in seven
different languages.
The 2020we/wi uses a state of the art, multi-detector optical
confi guration that assures long term stability of calibrations, high
precision and accuracy and low detection limits. All readings are
determined by sophisticated digital signal processing algorithms,
minimizing fl uctuations in readings and enabling rapid, repeatable
measurements. The microprocessor and optics enable a dynamic range
and auto-ranging over several ranges. Energy effi cient LED light sources
are used for ISO turbidity. EPA turbidity uses a tungsten fi lament light
source that meets or exceeds EPA specifi cations and is designed for a
uniform light spot image and stable output.
A USB wall adapter, USB computer connection or lithium battery powers
the 2020we/wi.
A USB port on the back of the meter allows an interface of the meter
with a Windows-based computer for real-time data acquisition and
data storage using a PC. The 2020we/wi may be interfaced with any
Windows-based computer by using the LaMotte SMARTLink 3 Program.
GENERAL OPERATING INFORMATION
The operation of the 2020we/wi is controlled by the menu driven
software and user interface. A menu is a list of choices. This allows a
selection of various tasks for the 2020we/wi to perform, such as, scan
blank and scan sample. The keypad is used to make menu selections
that are viewed on the display.
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