Hach-Lange DR 3800 User Manual - Manual (Page 95)

95
Advanced Operations
λ / Absorbance formula:
1. Press Absorbance Formula.
2. The formula selected in the top key determines the number of
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.
The following formulas are available:
K
1
A
1
+ K
2
A
2
K
1
A
1
+ K
2
A
2
+ K
3
A
3
K
1
A
1
+ K
2
A
2
+ K
3
A
3
+ K
4
A
4
K
1
A
1
/ K
2
A
2
(K
1
A
1
+ K
2
A
2
) / K
3
A
3
(K
1
A
1
+ K
2
A
2
) / (K
3
A
3
+ K
4
A
4
)
A
1
refers to the absorbance at wavelength 1
A
2
refers to the absorbance at wavelength 2, etc.
K
1
refers to the coefficient at wavelength 1
K
2
refers to the coefficient at wavelength 2, etc.
Coefficients can be set negative where subtraction is required.
Recall Data
Call up saved measurement data, wavelength scans or time courses, see section 5.3 on
page 35 .
Instrument Setup Basic data of the instrument, see section 5.2 on page 25 .
Table 13 Multi-wavelength setup options (continued)
Options Description