Hach DR 1900 Manuel D'utilisation De Base page 13

Option
Standard Adjust
Dilution Factor
Standard
Additions
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.
Select Time Course options
1. Push SETTINGS>Photometer Functions>Time Course>Options.
2. Select the applicable options.
Option
Total Minutes
Interval Seconds Enter the interval in seconds for the Time Course. Range: 10 to 600. Default: 30 seconds
Wavelength
Data Recall
Description
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.
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.
Description
Enter the total time in minutes for the Time Course. Range: 1 to 60. Default: 10 minutes
Select a wavelength between 340 and 800 nm. Default: 560 nm
Show the saved Time Course data.
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