Hach DR 5000 - Stray Light Check

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Advanced Operations
6.8.3.3 Stray light check
The Stray Light test is used to measure the stray light in the
instrument at 220.0 nm and 340.0 nm.
1. Press Stray Light Check in the Optical Checks menu.
2. Press λ to select the wavelength.
3. Make a choice and confirm with OK.
4. Press Zero.
5. Insert the sample cuvette/cell or reference filter into the cell
compartment. Close the cell compartment. Press Start.