Hach DR 1900 Basic User Manual

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1. Push Options to access Options>Advanced Options.2. Use the advanced options to specify more parameters.Option DescriptionChemical Form Select the alternate chemical form and the associated measuring range on somefactory-installed methods.Reagent Blank The Reagent Blank correction can be used with some of the factory-installed methods.Enter the result of a completed test using deionized water as the sample. The blankvalue is subtracted from every result to correct for any background color due toreagents. Enter the blank correction before the Standard Adjust option is used.Complete this correction for each new lot of test reagents.Standard Adjust Change stored calibration. Complete a test on a known standard at a concentrationnear the top of the test range. Use this function to adjust the result to align the standardconcentration.Dilution Factor Enter a corrective dilution factor for specific characteristics. The entered number promptwill be multiplied by the result for the adjustment. For example, if the sample has beendiluted by a factor of 2, set the dilution factor to on and enter 2.Note: When a dilution is in effect, the dilution icon is shown on the display.StandardAdditionsExamine the reading accuracy. Refer to the method procedure for more information.Edit Change and update an existing program.Select the reading modeSelect Single Wavelength, Multi Wavelength or Time Course from the SETTINGS>PhotometerFunctions menu.Select Single Wavelength options1. Push SETTINGS>Photometer Functions>Single Wavelength>Options>Advanced Options.2. Select the applicable options.Option Descriptionλ Select a wavelength between 340 to 800 nm. Default: 560 nmConcentration Select the applicable unit and enter the factor. Defaults: mg/L and 1.000Resolution Select the resolution with the necessary number of decimal places. Default: 0.01Save 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 andlower limit and the timer 1–4.Select Multi Wavelength options1. Push SETTINGS>Photometer Functions>Multi Wavelength>Options>AdvancedOptions>λ1–λ4.2. Select the applicable options.Option DescriptionWavelength 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.English 13