Labconco FreeZone 4.5 Liter Freeze Dry Systems 77510 Series - Manual (Page 8)

Chapter 1: Introduction
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Samples Containing Volatile Substances
In certain cases the solvent in a sample to be freeze dried may contain volatile
components such as acetonitrile, methanol, acetic acid, formic acid or pyridine. In
addition to these substances having an effect on the eutectic temperature, they may
increase the vapor pressure at the surface of the sample. Also, compared to water,
they will require the absorption of less heat for sublimation to occur. Hence,
samples that contain volatile substances will have a greater tendency to melt,
particularly when placed in flasks or exposed to room temperature. If a sample
containing a volatile substance tends to melt when placed on a freeze dry system,
dilution of the sample with more water will help keep the sample frozen. For
example, a 0.2M solution of acetic acid is much easier to freeze dry than a 0.5M
solution.
About This Manual
This manual is designed to help you learn how to install, use, and maintain your
Freeze Dryer. Instructions for performing routine maintenance and making minor
modifications to your Freeze Dryer are also included.
Chapter 1: Introduction provides a brief overview of the Freeze Dryer, explains
the organization of the manual, and defines the typographical conventions used in
the manual.
Chapter 2: Prerequisites explains what you need to do to prepare your site before
you install your Freeze Dryer. Electrical requirements are discussed.
Chapter 3: Getting Started contains the information you need to properly unpack,
inspect and install your Freeze Dryer.
Chapter 4: Using Your Freeze Dryer discusses the basic operation of your Freeze
Dryer. Information on how to attach samples and run the Freeze Dryer is included.
Chapter 5: Maintaining Your Freeze Dryer explains how to perform routine
maintenance on your Freeze Dryer.
Chapter 6: Using the RS232 Receptacle describes how to connect a computer for
monitoring the operation.
Chapter 7: Troubleshooting contains a table of problems you may encounter while
using your Freeze Dryer, including the probable causes of the problems, and
suggested corrective actions.
Chapter 8: Modifying Your Freeze Dryer Display describes how to calibrate the
vacuum display and restore factory settings.