Labconco Refrigerated CentriVap Centrifugal Concentrators 7310041 - Manual (Page 18)

Chapter 4: Using Your CentriVap Refrigerated Concentrator
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Glassware Selection
Normally, sample tubes should be filled no more than approximately half full.
Select the size of the sample tube so it is compatible with the rotor and the desired
sample size. Tubes should not be excessively loose in the rotor. Rotors are
available with holes for various size tubes. Refer to Chapter 6: Accessories for
Your CentriVap for available rotor sizes.
Loading Glassware into the CentriVap
Smooth operation of the CentriVap is dependent upon proper balance of the
machine. Therefore, if less than a full load of samples is run, it is important to
load samples into the CentriVap in a fairly symmetrical manner distributing the
weight of the samples evenly in the sample rotor.
Temperature Setting Guidelines
The evaporation rate achieved by the CentriVap is dependent upon a variety of
factors. These include the nature of the solvent, the temperature and the pressure
in the vacuum system.
As a general guideline, to speed the evaporation process, the CentriVap
temperature should be set as high as possible as long as the temperature will not
damage the sample or cause the sample to bump.
Time Setting Guidelines
The Refrigerated CentriVap allows two different temperatures to be programmed
for user specified periods of time. If sequential temperatures are not desired, set
Time at 2 to “0”. When both programmed times expire, the rotor will stop, the
heater and refrigeration systems shut off, the vacuum pump stops and vacuum is
purged from the chamber. An alarm sounds until any control button is pressed.
CentriVap Controls
The control panel for the CentriVap is shown below with a description about its
function.