Micromeritics AccuPyc 2 1340, Operator'S Manual

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Maintenance AccuPyc II 1340
5-4 Aug 2013
Maintenance
Calibrating the Pycnometer
You should check or calibrate the pycnometer every time you restart it. For a quick check, run
an analysis with an empty cup to see how close the average volume is to 0. It should be
±0.05% of full-scale. If it is not within ± 0.05% of full-scale, calibrate according to the
instructions provided in
Calibrating the Pycnometer , page 2-11 . When you calibrate the
pycnometer, cell volume and expansion volume in the set-up parameters are updated
automatically.
Greasing the Chamber Cap O-Ring
The cell chamber cap contains an O-ring that requires routine maintenance because it is so
often exposed to atmospheric conditions. The chamber cap O-ring should be greased at the
beginning of each period of use. Wear rubber gloves to prevent contaminating the grease with
oil from your fingertips.
1. Turn the chamber cap counterclockwise and lift it from the chamber.
2. Place the chamber cap on a clean surface, with the O-ring side exposed.
3. Place a small amount of Dow Corning High vacuum grease (or equivalent) on your index
finger.
4. Run your index finger around the O-ring groove.
5. Replace the chamber cap.