Cautions During Operation - Lab companion OV-11 Operation Manual

(8) Please let the unit avoid organic solvent like Acetone and Methyl Chloride and also avoid
from instrument the strong high frequency noise.
(9) Door can be opened up to 180° to left side and so please consider enough space.
(10) Please do not put the unit around machine caused strong high frequency noise such as
High frequency welder, High frequency sewing machine, High capacity SCR controller.

3. Cautions during operation

1) Caution
(1) You'd better use the air that is not containing moisture when you inject air in the oven.
Because the sample that has dried in the vacuum oven needs to be maintained in dried
condition. To satisfy above mentioned condition, Cold trap and Chemical moisture trap
can be used.
(2) The vacuum pump that is used in producing a vacuum condition needs a lubricant which
has extremely low vapor pressure (0.001-0.005MPa), however, unfortunately, if the
lubricant is contaminated by a solvent which has relatively higher vapor pressure than low
vapor pressure lubricant, the efficiency of a vacuum pump is going to be fell down. So,
physical sanction that prevents the pump from damaging is needed in prior process. The
vacuum pump needs cleaning for long-term use. To satisfy above-mentioned condition,
Cold trap and Particle filter can be used.
(3) Before using this unit, you'd better have full grip of the sample's physical and chemical
features. In vacuum condition, inner chamber temperature must be lower than the
sample's Boiling Point. And do not use a sample that is easy to be sublimated. Because if
not, sublimated sample may block up the vacuum line. In vacuum condition,
decomposition of organism is easy to be occurred. So, be careful to set up a setup
temperature.
(4) Before turn the vacuum pump off, you have to make Vacuum valve handle set to Close
position and stop vacuum pump. Otherwise, vacuum pump oil may flow backward into the
chamber due to vacuum state of chamber.
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