MagTek InSpec 9000-2005 - Manual (Page 43)

Section 4. Data Presentations
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PERFORMANCE CHARTS
The performance charts allow the operator to view data collect from multiple cards over multiple
days. Data can be selected from the database using eight different criteria, including the three
keywords selected before each card was read. The selected data is then displayed in one of two
charts, trend chart or histogram. These charts are used to detect problems before the encoding is
out of specification.
The trend chart can display maximum, minimum, average, maximum and minimum, or all three.
The trend chart will display the red/yellow/green limits as the profile charts did, but instead of
data from one card, the data is cards reads during a certain date with certain criteria. The data
points can also be an average of all the cards read on each day within the selected period with the
selected criteria.
The histogram chart can display maximum, minimum, or average. The histogram displays the
same data as the trend chart, but sorts the data by how many times each value occurs.
INTERPRETING PERFORMANCE CHARTS
When interpreting performance charts, the observer looks for trends. Compilations of daily
summaries or individual cards may reveal problems with the process of producing cards, or
encoding them, or the card stock, or the encoder, or even the Tester itself (cleaning for example).
The operator should report these trends to the supervisor, the technician or other appropriate
personnel. It may be helpful to print the chart to illustrate the trend.
SELECTING RECORDS
The Select Records toolbox displays the current selection and allows the operator any of the
eight criteria. Track allows the selection of one of the three tracks. Only one track can be
displayed at a time. Field allows the selection of one of the six measured attributes, amplitude,
bit size, start sentinel, etc. There are two formats to select from, individual cards and daily
average. Individual cards displays data for every card selected. Daily average displays one data
point for each day that cards were read on. The keywords are the selection that were made on the
main screen before each read. Not all keywords will be available for selections, only those
keywords that have been used to for at least one read. The date selection has several
predetermined periods along with the ability to select any starting and ending dates.