Hach Portable Spectrophotometer DR 2800 User Manual page 91

Portable spectrophotometer
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Options
Recall Data
Instrument Setup
Table 13 Multi-wavelength setup options (continued)
Description
Call up saved measurement data or time courses, see
Basic data of the instrument, see
λ / Absorbance formula:
1. Press Absorbance Formula.
2. The formula selected in the top key determines the number of
The following formulas are available:
K
1
K
1
K
1
K
1
(K
1
(K
1
A
1
A
2
K
1
K
2
Coefficients can be set negative where subtraction is required.
section 5.2 on page
wavelength and coefficent keys that will appear below. To
change the absorbance formula, press the top key, select a
formula from the displayed list and press OK. When a new
formula is selected, the number of variables below changes to
match.
A
+ K
A
1
2
2
A
+ K
A
+ K
A
1
2
2
3
3
A
+ K
A
+ K
A
+ K
1
2
2
3
3
A
/ K
A
1
2
2
A
+ K
A
) / K
A
1
2
2
3
3
A
+ K
A
) / (K
A
1
2
2
3
3
refers to the absorbance at wavelength 1
refers to the absorbance at wavelength 2, etc.
refers to the coefficient at wavelength 1
refers to the coefficient at wavelength 2, etc.
Advanced Operations
section 5.3 on page
37.
27.
A
4
4
+ K
A
)
4
4
91

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