Hach DR 5000 - Manual (Page 107)

107
Advanced Operations
6.8.3.1 Wavelength check
The Wavelength Check test is used to check wavelength accuracy
at 656.1 and 486.0 nm and to check bandwidth at 656.1 nm, only.
1. Press Wavelength Check in the Optical Checks menu.
2. Press λ to select the wavelength.
3. Make a choice and confirm with OK.
4. Press Start.
Note: During the warm-up phase of the UV lamp, the message ”Lamp
Warmup...“ is displayed.