INFICON HAPSITE ER Chemical Identification System - Manual (Page 428)

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HAPSITE ER Operating Manual
4 Lower the needle, either into an empty well or an empty vial. See Figure 13-8 .
NOTE: Do not puncture the sample septum until the sample has had
adequate time to equilibrate.
Figure 13-8 Inserting the Needle into a Vial
5 Close the yellow cover to prevent heat loss and promote thorough heating of
the needle assembly.
6 Keep track of the time when each sample was inserted into the well to monitor
equilibrium time. See
section 13.2.4, Cycling the Vials, on page 13-12 .
HINT: Consistency of heating times is very important!
NOTE: The 40 mL sample vials are intended for one time use only. The vial
and sample should be discarded properly when finished.
13.2.4 Cycling the Vials
Cycling the vials is performed to thermally equilibrate and analyze samples as
efficiently as possible. Four sample wells allow rotation of samples during analysis
for equilibrium times which are longer than a single sample run time.
Cycling the vials to achieve the desired equilibrium time:

Insert the first sample after the HSS sample heating block has reached the
setpoint temperature. Allow the sample to equilibrate for the desired time (as
determined when the calibration analyses were performed) and continue with
the analysis.
 For subsequent samples, determine a strategy for achieving the desired
equilibrium time while minimizing time between sample analysis.
HINT: Develop a consistent system such as analyzing samples in the same
position each time, and rotating samples clockwise or
counter-clockwise to that position during each sample shift.
NOTE: The 40 mL sample vials are intended for one time use only. The vial
and sample should be discarded properly when finished.