Hach Portable Spectrophotometer DR 2800 - Manual (Page 100)

100
Advanced Operations
6.7.3.2 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 cell
compartment #2. Press Zero.
4. Insert the sample cuvette/cell or reference filter into the cell
compartment #2. Close the cell compartment. Press Start.
5. The ”Average“ and ”Std Deviation“ are calculated from
100 successive absorbance measurements. 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.
Note: Failings and passings will be defined by the user.
6. Press Cancel to return to Optical Checks.