Hach-Lange DR 3900 User Manual - Manual (Page 115)

115
Expanded programs
7. Inset sample cell 1 ( Figure 3, page 19 ) in cell compartment
(1) a press Next.
8. Follow the dialog indicated.
9. After the fifth test cell, the photometrical accuracy is
displayed in a log.
6.8.3.3 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 cell adapter (A) for 10-mm rectangular cells in the
cell compartment (2).
3. Place the analysis cell (Neodym or BG20/2) in the cell
adapter.
4. Close the cell compartment cover.
5. Press Start.
The result will be displayed.
6. Compare the result with the analysis cell required values.
7. Press Cancel to return to Optical Checks.
6.8.3.4 Stray light check
The Stray Light test is used to measure the stray light in the
instrument at 340 nm.