Hach-Lange DR1900 User Manual - Manual (Page 18)

3. Push one of the navigation keys for the applicable options.
Option Description
RIGHT arrow Show the concentration results in different chemical forms.
LEFT arrow Show the absorbance of each reading during one measurement.
DOWN arrow Toggle between Concentration, Absorbance and %Transmittance.
4. Push SETTINGS>Photometer Functions>Single Wavelength or Multi Wavelength.
5. Push one of the navigation keys for the applicable options.
Option Description
RIGHT arrow Enter the wavelength setting menu.
LEFT arrow Show the absorbance of each reading.
DOWN arrow Toggle between Concentration, Absorbance and %Transmittance.
Instrument information
The instrument information menu shows specific information such as the instrument name, serial
number, software version, database version, memory used and program availability. Push
SETTINGS>Setup>Instrument Information.
Set the password
The password settings options are used to prevent access to restricted menus.
Note: If the specified password is forgotten and Security Options is set to on, the operator is locked out of the
restricted menus. Contact technical support if the password is forgotten.
1. Push SETTINGS>Setup>Password Settings.
2. Select an option.
Option Description
Password Settings Select On or Off to set the password protection to on or off.
Set Password Enter a password.
Protected Items Shows the list of protected items: setup, edit operator ID, edit K factor, edit user
programs, edit my workflow and delete datalog.
Set the display and sound
Use the display options to change the display contrast, the battery auto-shutoff options, the backlight
option or the display style. Use the sound options for an audible sound when a key is pushed, a
reading is complete or before the instrument sets the power to off automatically.
1. Push SETTINGS>Setup>Display & Sound>Display Options.
2. Select an option.
Option Description
Contrast Adjust the display contrast. The lightest setting is 0 and the darkest setting is 9. Default: 4
Auto-Shutoff To maximize battery life, set a time period after which the instrument will automatically set
the power to off if no key is pushed (5, 10, 15, 20, 30 minutes, 1 hour, 2 hours or Never
Off). Auto-shutoff is not active when the instrument is connected to AC power. Default:
30 minutes
Backlight The display backlight is set to on when BACKLIGHT is pushed. Set a time period after
which the backlight will automatically power off if no key is pushed (10, 20, 30 seconds, 1,
2, 5, 10 minutes or Never off). Default: 1 minute
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