Hach-Lange DR2800 eco - Manual (Page 41)

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Advanced Operations
6.1.3.1 Wavelength check
The Wavelength Check test is used to check wavelength accuracy
at 807 nm.
1. Press Wavelength Check in the Optical Checks menu.
2. Insert the adapter (A) for 10-mm rectangular cells in
compartment #2 and insert the sample cuvette/cell (Neodym or
BG20/2) in the adapter. Close the cell compartment.
Press Start.
3. The result is displayed and is to be compared with the
nominal/standard data (given in the quality control certificate) of
the sample cuvette/cell.
4. Press Cancel to return to Optical Checks.
6.1.3.2 Stray light check
The Stray Light test is used to measure the stray light in the
instrument at 340 nm.
1. Press Stray Light Check in the Optical Checks menu.
2. Remove any cuvette/sample cell from the cell compartment.
3. Insert the adapter (A) for 10-mm rectangular cells in the
compartment #2. Press Zero.