Hach-Lange DR1900 Basic User Manual - Manual (Page 13)

Select the reading mode
Select Single Wavelength, Multi Wavelength or Time Course from the SETTINGS>Photometer
Functions menu.
Select Single Wavelength options
1. Push SETTINGS>Photometer Functions>Single Wavelength>Options>Advanced Options.
2. Select the applicable options.
Option Description
λ Select a wavelength between 340 to 800 nm. Default: 560 nm
Concentration Select the applicable unit and enter the factor. Defaults: mg/L and 1.000
Resolution Select the resolution with the necessary number of decimal places. Default: 0.01
Save to User Programs Save the selected parameter as an unique user program. Select the name, unit,
wavelength, resolution, chemical formulas 1–4, calibration formula, upper and
lower limit and the timer 1–4.
Select Multi Wavelength options
1. Push SETTINGS>Photometer Functions>Multi Wavelength>Options>Advanced
Options>λ1–λ4.
2. Select the applicable options.
Option Description
Wavelength Select two or more wavelengths. Defaults: 400, 500, 700 or 800 nm.
Abs Formula Select the applicable absorbance formulas for the calculation of the multi-wavelength reading.
The formula specifies the wavelength and the coefficients.
Factors Select the multiplication factors for converting absorbance values into concentration values.
Select Time Course options
1. Push SETTINGS>Photometer Functions>Time Course>Options.
2. Select the applicable options.
Option Description
Total Minutes Enter the total time in minutes for the Time Course. Range: 1 to 60. Default: 10 minutes
Interval Seconds Enter the interval in seconds for the Time Course. Range: 10 to 600. Default: 30 seconds
Wavelength Select a wavelength between 340 and 800 nm. Default: 560 nm
Data Recall Show the saved Time Course data.
Show Table Show the saved Time Course data in a table.
Exit Exit the current menu.
Use a sample ID
The sample ID tag is used to associate readings with a particular sample or with a location. If
assigned, stored data will include this ID.
English 13