LaMotte 2020i Turbidimeter - Manual (Page 31)

Meter freezes Lid was opened when
reading was being taken. Close lid. Read again.
Unplug adapter. Plug
adapter in to reset.
Stray Light
The accuracy of readings on the 2020 should not be affected by stray light. Make sure
that the sample compartment lid is always fully closed when taking readings.
GENERAL OPERATING INFORMATION
Overview
The 2020 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 six different
languages.
The 2020 uses a state of the art, multi-detector micro optical configuration 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 fluctuations in readings and enabling rapid, repeatable
measurements. The microprocessor and optics enable a dynamic range and
auto-ranging over several ranges. Energy efficient LED light sources are used for ISO
turbidity. EPA turbidity uses a tungsten filament light source that meets or exceeds EPA
specifications and is designed for a uniform light spot image and stable output.
Tube positioning rings are supplied with the 2020. These rings snap onto the
shoulders of the tubes. The rings ensure that the tubes are positioned in the chamber
in the same orientation from one reading to the next. This minimizes variations in
readings due to differences in tube position. This results in greater repeatability and is
especially important for samples with low turbidity.
A 9-volt alkaline battery powers
the 2020 and an optional AC
adapter is available. A fresh
battery should be installed at all
times even when using the AC
adapter.
An RS232 serial port on the
back of the meter allows an
interface of the meter with an
IBM compatible computer for
real-time data acquisition and
data storage using a PC. The
2020 may be interfaced with
any Windows-based computer
by using the LaMotte SMARTLink
2 Program. The port also allows
an interface with an RS232 serial
printer.
GENERAL OPERATING INFORMATION 31
Back
View
Side
View
RS232
Serial Port
AC
Adapter Socket
Lid