Waters 2475, Operator'S Manual, Page: 175 / 228

User-selected diagnostic tests and settings 5-17
Testing the display
To test the display:
1. Press DIAG, then press 7 Lamp, display & keypad >>.
2. Press 3 Test display.
The display fills from top to bottom and right to left, and then returns to
the Lamp, display & keypad list. If the display does not completely fill
horizontally or vertically, contact your Waters service representative.
3. Press 4 to return to the diagnostics list.
Other diagnostic tests and settings
The Other diagnostic tests and settings screen provides three additional
diagnostic functions:
• Generate test peaks – Generates test peaks to calibrate a chart recorder
or data system.
• Manually override the optical filter – Selects a filter different from the
one used in the detector’s normal operating mode.
• PMT Sensitivity – Reduces PMT sensitivity by a factor of 10 or 100 to
avoid saturation with highly fluorescent samples and mobile phases.
Press DIAG, and then press 8 Other diagnostics. You can generate test peaks
(see page 5-17 ) or override the optical filter (see page 5-18 ).
Other diagnostic tests and settings
Generating test peaks
The generate test peaks function changes the first entry on the list to “Disable
test peaks.”