64 Operation
7 Sequences
What Is a Sequence?
A sequence for the 7697A Headspace Sampler is an ordered
series of sample vials to prepare and inject, including the
method needed to prepare each vial. For the 7697A HS:
• All sample processing occurs in a sequence. To run a
sample, there must be a sequence defined.
• A sequence can skips vials.
• A sequence can run a vial more than once.
• A sequence does not require any particular vial order.
Running vials 1, 49, 5, 2, 3, and 101 is valid.
A sequence consists of a series of lines. Each line contains a
range of vials, the method number to use for these vials, and
the number of injections to make using each vial.
To view a sequence, press [Seq].
Use the scroll keys to view all lines in the sequence.
Sequences, extraction modes, and vial punctures
In the sequence you can specify the same vial in as many
entry lines as desired. How the HS sampler processes the
vial depends on the method Extraction mode and the
sequence:
• Extraction mode is Single.
If a vial appears more than once in a sequence, or if the
number of injections is greater than one, the vial is
completely reprocessed for each entry or injection.
• Extraction mode is Multiple.
If the number of injections per vial is greater than 1, the
HS will puncture the vial once, then make the extractions
and injections. The HS will not perform multiple vial
punctures.
SEQUENCE (line 1 of 6)
Method: Stored method #1<
Vials 1-1
Injections per vial 1
Current line
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