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8.5 Pre-Impactor
WARNING: Be sure to configure the carousel size to the correct setting (38 or
80 vial carousel) in the software. Incorrectly setting the carousel size will cause the
needle to be damaged and failure of the Auto-collector.
To pause sampling, click the 'STOP' button. Reclicking the 'START' button will resume
sampling. To immediately stop the Auto-collector, click the 'Shutdown' button.
Description of Auto-collector output file
Each Auto-collector run cycle creates a unique log file with the date and start time in
the filename. The files are stored in directories (folders) named with the date of the run.
The header of the log file contains the log file directory path, carousel size, start position,
starting vial number, number of vials, vial fill time and Auto-collector COM port.
The main body of the log file contains five columns: date, time, seconds since start of
the run, carousel position and sample vial number. These data are important in that
they allow the user to time synchronize liquid samples collected into vials with data from
other instruments. Other user messages like "Begin Fill Vials", "Begin Shutdown" and
"Shutdown Complete" are also written to the log file to track the tasks performed by the
device.
Errors are also recorded in the log file. For example, if the needle is unable to properly
insert into the vial a "Needle Insert Fail" error will be written to the file. Other errors
include: "Needle Retract Fail", "Carousel Homing Error" and "Carousel Rotate Error".
8.5 Pre-Impactor
The particle pre-impactor should be inspected regularly for build-up of particulate mat-
ter and cleaned to prevent clogging. The impactor cleaning procedure is provided in the
impactor manual.
IMPORTANT: Familiarize yourself with the typically observed pressure drop measured
across the impactor under normal sample air flow operating conditions. If the pres-
sure drop begins to increase, clean the impactor plate! . Refer to the user manual deliv-
ered with your impactor for additional details.
83-00009-01A
PILS 4001-115V and 4001-230V
Page 59 of 74
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