Labconco RapidVap Vacuum, N2 and N2/48 Evaporation Systems 7910015 - Manual (Page 31)

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Chapter 4: Using Your RapidVap
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distributing the weight of the samples and glassware
evenly in the sample block.
IN ORDER TO MAXIMIZE THE
PERFORMANCE OF THE RAPIDVAP
IT IS IMPORTANT THAT SOME OF
THE SAMPLES ARE CLUSTERED
AROUND THE FRONT LEFT HAND
BLOCK MOUNTING STUD. THE
BLOCK TEMPERATURE SENSOR IS
LOCATED ADJACENT TO THIS
BLOCK MOUNTING STUD. BY
POSITIONING THE SAMPLE NEAR
THE SENSOR, THE SENSOR WILL
DETECT THE COOLING EFFECT OF
THE EVAPORATING SAMPLES AND
SIGNAL THE CONTROLS TO
SUPPLY MORE HEAT TO THE
SAMPLE BLOCK.
The best evaporation rate is achieved under conditions
that maximize sample surface area. These include
using the largest tube possible, and using the highest
vortex speed possible.
When less than 8 samples are run in the RapidVap N
2
or less than 48 samples are run in the RapidVap N
2
/48,
nitrogen flow can be directed to 2, 4, or 6 positions. It
is important to position glassware properly in the
RapidVap N
2
when less than a full block is run to
ensure that nitrogen gas is directed downward where
the sample is located. Note the label on the hub in the
center of the chamber. This indicates which nozzles on
a RapidVap N
2
or nozzle clusters on a RapidVap N
2
/48
will be activated. If one or two positions are to be run,
samples must be positioned at locations identified (2).
If three or four positions are to be run, samples must be
positioned at locations identified (4). If five or six
positions are to be run, samples must be positioned at
locations identified (6). If seven or eight positions are
to be run, samples may be positioned at any of the
locations. When using the RapidVap N
2
/48, glassware
may be placed anywhere within the activated cluster of
nozzles.
N
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