Hach DR 1900 Manuel D'utilisation De Base page 13

1. Push Options to access Options>Advanced Options.
2. Use the advanced options to specify more parameters.
Option
Chemical Form
Reagent Blank
Standard Adjust
Dilution Factor
Standard
Additions
Edit
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
λ
Concentration
Resolution
Save to User Programs Save the selected parameter as an unique user program. Select the name, unit,
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.
Description
Select the alternate chemical form and the associated measuring range on some
factory-installed methods.
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 blank
value is subtracted from every result to correct for any background color due to
reagents. Enter the blank correction before the Standard Adjust option is used.
Complete this correction for each new lot of test reagents.
Change stored calibration. Complete a test on a known standard at a concentration
near the top of the test range. Use this function to adjust the result to align the standard
concentration.
Enter a corrective dilution factor for specific characteristics. The entered number prompt
will be multiplied by the result for the adjustment. For example, if the sample has been
diluted 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.
Examine the reading accuracy. Refer to the method procedure for more information.
Change and update an existing program.
Description
Select a wavelength between 340 to 800 nm. Default: 560 nm
Select the applicable unit and enter the factor. Defaults: mg/L and 1.000
Select the resolution with the necessary number of decimal places. Default: 0.01
wavelength, resolution, chemical formulas 1–4, calibration formula, upper and
lower limit and the timer 1–4.
English 13