Advanced
®
Micro-Osmometer Model 3320 User’s Guide
34
When indicated, the cooling chamber may be damp cleaned as follows.
1. Using the keypad, enter the Utilities Menu or allow the instrument
to go into Stand-by Mode. This allows the cooling chamber to warm
to room temperature.
2. Dampen (do not saturate) the end of a chamber cleaner with 70%
isopropanol solution.
3. Firmly insert the dampened chamber cleaner all the way into the
sample port (see figure 6, step 8), rotate it four or five times (clock-
wise and counter-clockwise) and withdraw. If the end is stained or
has debris stuck to it, repeat with another dampened chamber clean-
er.
4. Repeat with a dry chamber cleaner. Insert and leave a clean, dry
chamber cleaner in the sample port until the next sample is to be
tested.
5. If the unit was placed in the Utilities Menu, use the keypad to exit
and return to the "Osmometer Ready" prompt.
Solenoid cleaning
This cleaning procedure should be used if you suspect that your sam-
ples are not freezing properly because the solenoid impactor cannot
move freely due to the accumulation of sample residue within the freez-
ing chamber.
1. Remove the power cord from the rear of instrument.
2. Loosen the screw (Figure 9) holding the solenoid cover on the
instrument and remove the cover.
3. Place a dry chamber cleaner in the cooling chamber.
4. Locate the solenoid retainer and loosen both screws (Figure 10).
Remove the retainer.
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