118 1100 Series FD Reference Manual
4 Troubleshooting and Test Functions
Excitation and Emission Grating Resistance History
This test runs automatically when the instrument is turned on (not accessible
as an external test).
It provides the resistance history of the excitation and the emission grating
drives. The number of revolutions after switching off the drives is a measure
of friction. The history may show an increasing friction of the drive(s) over a
length of time.
The history data contains the data/time information and the number of turns.
The data/plot can be retrieved via the diagnostics.
Friction Evaluation
Motor Error
Probable Causes
• Friction too high (< 12 turns)
• Defective monochromator assembly.
Suggested Actions
✔ Exchange the monochromator assembly.
Figure 46 Resistance History
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