Advanced Instruments 3300, Руководство пользователя

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2. Use a small flat-bladed screwdriver or similar tool to pry out the fuse
holder.
3. Double-check the values marked on the fuses. The Model 3300 will
automatically adjust for voltages between 100VAC and 250VAC but
appropriately rated fuses must be installed. Use 5 × 20mm, 250V,
time delay (Type T) fuses. For 100-130V operation, use 1.25-Amp
fuses; for 200-250V operation use 1-Amp fuses.
4. Re-install the fuse holder into the back of the instrument.
5. Re-connect the power cord and switch the power switch to the on
position. The instrument should start up as normal.
Chamber cleaning
The cooling chamber and probe are easy to keep clean and dry by faith-
fully following the operating instructions for cleaning the freezing
chamber after each test. If traces of standards or biological samples are
left in the sample chamber, however, the task will be more difficult and
damp cleaning will probably be required. Two indicators that damp
cleaning may be required are:
• The instrument has been in use but no clean, dry chamber cleaner is
found in the sample port and successive results on aliquots of the
same sample indicate chamber contamination (the first aliquot read-
ing very high and subsequent readings progressively lower).
33
Troubleshooting & Service
Figure 4: Fuse Replacement