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Preventive Maintenance
Sample Particulate Filter Inspection
Thermo Fisher Scientific
Model 43i Trace Level-Enhanced Instruction Manual
5-5
Figure 5–1.
Inspecting and Cleaning the Fan
If a sample pre-filter is used, it should be inspected regularly for excessive
dust and particulates which will restrict flow. Replace the sample filter as
necessary.
The instrument is equipped with a lamp voltage control circuit, which
automatically corrects for degradation of the flash lamp. However, after
several years of use, the lamp may have degraded to the point that is being
driven with the maximum voltage that the power supply can deliver.
Use the following procedure to check the lamp voltage.
1.
Press
to display the Main Menu.
2.
From the Main Menu, select Diagnostics > Voltages >
Interface Board
and press
to display the Interface Board Voltages screen
3.
Check the flash supply voltage. If this voltage is at 1200 V, it is
necessary to either replace the lamp or adjust the lamp voltage control
circuit.
Sample
Particulate Filter
Inspection
Lamp Voltage
Check
Mounting Screws (4)
Filter
Fan Guard
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