PerkinElmer Photovac MicroFID, User Manual

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Technical Description
an ion current proportional to 10 ppm of methane. The reading is
actually 10 ppm methane equivalent units. MicroFID readings give
an indication of the total ionizables present and their concentration
relative the calibration gas.
Datalogging
Interval Operation
The microprocessor accumulates all readings in an averaging
interval, that you select, and determines the minimum, average and
maximum readings. It stores these numbers along with the highest
priority instrument status and the most recent time, date and Event
that occurred during the interval. MicroFID records these results
when the datalogger is turned on. The number of events that are
stored in the datalogger will depend on the averaging interval you
have selected.
These recorded data can now be played back on MicroFID’s
display. The display is identical to the numeric or bar graph display,
but the instrument status is “Play” indicating that recorded data, not
real­time data, are being displayed. During playback MicroFID
continues to analyze and record new data.
Recorded data can also be printed as either a table or a graph. For
each averaging interval, MicroFID prints the minimum of all the
minima, the average of all the averages and the maximum of all the
maxima.
Method 21 Mode
In Method 21 operation you log data manually. You must program a
monitoring schedule into the instrument and then monitor sites
according to the Method 21 documentation.
The Method 21 option first prompts you to locate a specific
sampling site and then allows you to record both a background and
sample entry in the datalogger. MicroFID stores these numbers
along the difference between sample and background, the highest
priority instrument status and the most recent time, date and Event
name.
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