Hach-Lange DR 3900 User Manual - Manual (Page 23)

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Section 4 Start up
4.1 Switch on the instrument, startup process
1. Connect the power cable to the mains outlet.
2. Switch on the instrument by using the power button next to
the display.
3. The instrument starts automatically with a startup process
lasting approximately 45 seconds. The display shows the
logo of the manufacturer. At the end of the startup process, a
startup melody is heard.
Note: Wait approximately 20 seconds before switching on again so as
not to damage the electronics and mechanics of the instrument.
4.2 Language selection
The DR 3900 software includes several language options. The
first time the instrument is switched on, the language selection
screen will be shown automatically after the startup process.
1. Select the required language.
2. Press OK to confirm the language selection. The self-check
will then start automatically.
Change the language setting
The instrument functions in the selected language until the option
is changed.
1. Turn the instrument on.
2. During the startup process, touch any point on the screen
and maintain contact until the option for selecting a language
is shown (approximately 45 seconds).
3. Select the required language.
4. Press OK to confirm the language selection. The self-check
will then start automatically.
4.3 Self-check
Each time the instrument is powered up, a test program begins.
This procedure, which takes approximately two minutes, checks
the system, lamp, filter adjustment, wavelength calibration and
voltage. Each test that functions correctly is marked accordingly.
The Main Menu is displayed when diagnostics are completed.
Note: In the event of further error messages during the test program,
refer to
Section 8, page 133 .