MagTek InSpec 9000 - Manual (Page 20)

InSpec 9000 Encoded Card Tester
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3.
If there is still some doubt about the accuracy of the Tester, run the other test card and
check the values as described in step 2. If necessary, perform the 0.5-micron head
polishing procedure below.
Head Polishing - 0.5-micron (Abrasive Card), P/N 96700014
If the Tester shows a change in amplitude of approximately 15% to 20% after the Test Card
Procedure is run, use the 0.5 micron (abrasive) head-polishing card, P/N 96700014, and clean the
head as follows:
1.
With the abrasive stripe up and to the left, insert the card and click on Clean Unit.
2.
The card will move in and out of the Tester three times.
Caution
Do not run the head-polishing card with abrasive stripe down, or
damage to the roller surface and the Tester may result.
3.
Remove the head-polishing card from the Tester, and run the cleaning card.
Note
Do not discard the head-polishing card after one use; this card is
for multiple use.
4. Perform the Test Card procedure to ensure the Tester is within tolerance. If the results
are not within spec, call service personnel.
SAMPLING TECHNIQUES
The InSpec 9000 Encoded Card Tester is designed for a production environment; that is, samples
are taken from a large production run and tested on the InSpec 9000. The samples tested
represent a lot or batch. The lot or batch is accepted or rejected on the basis of these samples.
More than sampling lots for acceptance or rejection, the Tester also reveals problem trends with
the processes of producing, encoding, or testing cards. Because of the graphics presentations
and database in the Tester, problem trends are easier to identify. (See Section 4, Graphics
Presentations, Interpreting Performance Charts.)
There are many techniques for sampling, and the example below is commonly used in industry.
The example is taken from the following publication:
ANSI/ASQC Z1.4 - 1993, American National Standard, Sampling Procedures and Tables for
Inspection by Attributes, American Society for Quality Control.