19Section 4 Start Up4.1 Power the instrument on and off1. Plug in power supply.2. Close the empty cell compartment.3. Turn the instrument on by pressing the power switch on theback.Note: Do not turn the instrument off and on in rapid succession. Alwayswait about 20 seconds before turning the instrument on again, otherwisethe electronic and mechanical systems will be damaged.4.2 Language selectionThe spectrophotometer software includes several languageoptions. The first time the instrument is turned on, the languageselection screen will appear.1. Select the desired language.2. Press OK to confirm the language selection. The self check willstart automatically.Changing the language settingThe instrument functions in the selected language until the option ischanged.1. While turning the instrument on, touch the screen at any pointuntil the list for selecting a language appears (about30 seconds).2. Select the required language.3. Press OK to confirm. The test program subsequently startsautomatically.4.3 Self-CheckEach time the instrument is powered up, a series of diagnostic testsare performed automatically to ensure operation of major systemcomponents.This procedure, which takes approximately two minutes, checks thesystem, lamp, filter adjustment, wavelength calibration and voltage.Each test which functions correctly is confirmed with a check mark.The Main Menu is displayed when power up diagnostics arecompleted.Note: Further error messages during self check, see Section 8 on page127.
