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Particulate Filter
Inspection
Lamp Voltage
Thermo Fisher Scientific
Figure 5–1. Inspecting and Cleaning the Fan
Sample
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
Check
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
2. From the Main Menu, select Diagnostics > Voltages > Interface Board
and press
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.
to display the Main Menu.
to display the Interface Board Voltages screen
Model 43i Trace Level-Enhanced Instruction Manual
Preventive Maintenance
Sample Particulate Filter Inspection
Mounting Screws (4)
Filter
Fan Guard
5-5
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Troubleshooting
