LaMotte LTC3000wi Turbidity & Chlorine Lab Meter - Manual (Page 78)

 STRAY LIGHT
The accuracy of readings on the LTC3000we/wi should not be affected
by stray light. Make sure that the sample compartment lid is always fully
closed when taking readings. The backlight will interfere with turbidity
readings. The meter will temporarily disable the backlight while turbidity
measurements are being taken.
GENERAL OPERATING INFORMATION
 OVERVIEW
The LTC3000we/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 6 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 LTC3000we/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 computer/wall charger or Lithium battery powers the
LTC3000we/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 LTC3000we/wi may be interfaced with any
Windows-based computer by using the LaMotte SMARTLink 3 Program.
GENERAL OPERATING INFORMATION
The operation of the LTC3000we/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 LTC3000we/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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