Hach DR 2800 user manual Calibration settings for single and multi wavelength mode

Advanced Operations

Chemical form:

Enter the chemical formula used in the display to represent the analysis parameter.

Use the alphanumeric keypad to enter the chemical form and press Next to enter Calibration settings.

6.1.1.3 Calibration settings for single and multi wavelength mode

	A method is calibrated by determining the absorbance values of
	several standard solutions of known concentration.
	There are three ways to create and store a calibration curve.
	Instructions for each method follows (Table 9).
	Table 9 Calibration settings
Mode	Descriptions
	A calibration table is created by entering the concentration values and the absorbance values of
Enter values	the analyte solution. The absorbance values are plotted versus standard concentrations and the
	calibration curve is displayed as a graph (page 66).
	A calibration table is created by entering the concentration values of the standard solutions and
Read Standards	then measuring the absorbance of the analyte solutions. The absorbance values are plotted
	versus standard concentrations and the calibration curve is displayed as a graph (page 68).
	If the calibration curve can be determined from the mathematical relationship between
Enter Formula	concentration and absorbance by linear regression, etc., the corresponding formula can be
	selected (linear, 2nd or 3rd order polynomial) from a list and the appropriate factors can be
	entered (page 69).
	Calibration by entering calibration values
	Enter concentration/absorbance
	1. Select the Enter Values and press Next.

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