About This Manual
Intended User
3
Chapter 7: Developing Methods describes the parameter changes that can
affect sensitivity, precision, and accuracy.
Chapter 8: Running a Sample summarizes operation of the headspace
sampler to run a sample.
Chapter 9: Maintaining the Instrument describes maintenance procedures
including changing the sample loop, transfer line, needle, valves, and EPROM.
Chapter 10: Troubleshooting lists the possible causes and solutions for
chromatography problems or instrument failure.
Chapter 11: Error Messages describes the various error messages that
accompany machine failures and the means to correct the failures.
Intended User
This manual is intended for users who understand the basics of gas
chromatography. Although the manual contains some headspace theory, it
primarily provides operating, maintenance, and troubleshooting information
for the 7694 Headspace Sampler.
Conventions
The following conventions are used in this manual:
1. Braces { } enclose a generic name for which you should substitute specific
information. For example, {setpoint} means you should key in the numeric
value you desire for the setpoint.
2. Text in Bold means that you should press the key by that name.
Be careful how you enter information. For example, the key sequence Adv
Fnct, ., 1, Enter indicates that you should press the Adv Fnct key, the .
key, the 1 key, and then Enter. It does not mean that you should press a
comma (“,”). There is no comma on the sampler’s keypad.
3. Text in Courier indicates the message you will read on the sampler
display.
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