Hach DR 2800 user manual Absorbance formula Press Absorbance Formula

Advanced Operations

	Table 13 Multi-wavelength setup options (continued)
Options	Description
Recall Data	Call up saved measurement data or time courses, see section 5.3 on page 37.
Instrument Setup	Basic data of the instrument, see section 5.2 on page 27.

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:

K1 A 1 + K 2 A 2

K 1 A 1 + K 2 A 2 + K 3 A 3

K1 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

A2 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.

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