Hach-Lange DR 2800 eco - Manual (Page 91)

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Advanced Operations
6.3 Single Wavelength (absorbance, concentration and transmittance
measurements; DR 2800 only)
The Single Wavelength Mode can be used in three ways. If you
know the wavelength of a parameter, you can set the instrument to
measure the absorbance, % transmittance, or concentration of the
analyte.
Absorbance measures the amount of light absorbed by the sample,
in units of Absorbance.
% transmittance measures the percent of the original light that
passes through the sample and reaches the detector.
Turning on the concentration factor lets you select a specific
multiplier for converting absorbance readings to concentration. In a
graph of concentration versus the absorbance, the concentration
factor is the slope of the line.
6.3.1 Setting Up Single Wavelength Mode
1. Press Single Wavelength in the ”Main Menu“.
2. Press Options for Parameter Setup.
Table 12 ”Single Wavelength“ options
Figure 14 Options
Options Description
More... For further Options
Store Off/On
With the Store On setting, all measurement data are stored automatically. With the Store Off
setting, no measurement data are stored.
% Trans/Abs To switch to % transmittance, concentration or absorbance readings
λ
Wavelength
To enter the measurement wavelength. Use the alphanumeric keypad to enter the measurement
wavelength. The entered wavelength must be in the range from
340–900 nm.
Timer icon
This functions as a stopwatch. It helps to ensure that the steps of an analysis are correctly timed
(e.g. reaction times, wait times, etc., can be exactly specified). When the specified time has
elapsed, an acoustic signal is emitted. The use of the timer has no influence on the measurement
program.
Concentration Factor Multiplication factor for converting absorbance values into concentration values.