Hach Portable Spectrophotometer DR 2800 - Manual (Page 65)

65
Advanced Operations
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 completed, the factors can be entered
with a minus sign.
Wavelength λ
x
:
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
Multiplication factor for converting absorbance values into
concentration values.
Press a factor key and use the alphanumeric keypad to enter a
factor. If the formula includes more than one factor, press another
factor key and enter another factor and repeat until all the factors
have been entered. Press OK. When all the relevant data have
been entered, press Next.
Note: Up to 5 digits can be entered, including a maximum of 4 decimal
places to the right of the decimal.
Concentration resolution (number of decimal places)
Select the required number of decimal places from the displayed
list and press Next.