Hach DR 2800, Руководство пользователя, Страница: 50 / 96

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Advanced Operations
6.1.1.2 Multi-wavelength Programming
Units of Measure
Select the required unit from the list and press
NEXT
.
Note: A user-specific unit that is not included in this list can be added
in the edit program under
PROGRAM OPTIONS>EDIT
.
Absorbance Formula
The Absorbance Formula menu is used to define the wavelengths
and the coefficients used in the formula. The absorbance formula
defines the calculation for the multi-wavelength measurement.
Press the appropriate key to edit the input.
Press the
FORMULA
key.
In the displayed list, select the formula for the program and press
OK
to confirm.
List of available Absorbance Formulas
A
1
is the absorbance at wavelength 1,
A
2
is the absorbance at wavelength 2 and so on
K
1
is the factor at wavelength 1,
K
2
is the factor at wavelength 2, and so on
If a subtraction has to be performed, the factors can be entered with
a minus sign.
Wavelength
λ
x
(Multi-wavelength)
Press a
λ
x
key and use the alphanumeric keypad to enter a
wavelength. Press another
λ
x
key and enter the next wavelength. If
necessary, repeat until all the wavelengths for the formula have
been entered. The wavelengths must be in the range from
340 - 900 nm. Press
OK
.
Concentration Factor Kx (Multi-wavelength)
Multiplication factor for converting absorbance values into
concentration values.