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Card Readers
CARD READERS - GENERAL HINTS
1.
A common cause of read checks is off·punched or worn cards.
2.
Use a card gauge to determine off punching.
3.
A validity check usually indicates a double punch in rows
1-7
of the card.
4.
When bringing
new
cards into the computer room from a different environ-
ment (heat, humidityl, do not use them for the first 12 hours.
5.
Cards do \Near out. Reproduce master decks when you notice excessive
marking or
~oring
on the edges.
6.
Some common sense messages that may type out on the console are:
Page 5·10
Intervantion Required -
Operator attention is needed to empty the
stacker, fill the hopper, press END OF FILE, clear the transport, close a
cover, or restore ready status. This indication also accompanies a read
station failure that occurs during reading.
Equipment Check -
Indicates that the two readings of a column did
not agree. Also indicates that the read station failed before reading
begins.
Data
Check -
Indicates that the machine has detected an invalid card
column (more than one punch in rows
1-71
in data mode
1.
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