Honeywell 400 Series Hardware Manual page 30

3. OPERATING IN STR U CTIONS
Operating the punched card subsystems involves Setting up the subsystem, loading and
unloading cards, and correcting alert conditions. General procedures are described
below. Specific procedures for the individual subsystems are given later in this chapter.
CARE OF PUNCH CARDS
Punch cards are precision media. They must be handled and stored with card to protect
the punched information, ensure correct processing, and prevent damage to equipment.
Environmental limits must be observed. Dampness and dirt can damage both cards and
equipment. Unnecessary or careless handling can damage cards.
Recommended operating conditions are:
Temperature--65 to 85 degrees Fahrenheit (18 to 29 degrees Centigrade)
Humidity --40 to 60 percent
Air --free of dust
Handling Cards
Cards should not be bent, folded, or otherwise damaged. All edges of the card, particularly
the leading edge, should be smooth and free of burrs and creases. Cards should not be
handled roughly or held together by staples, paper clips, or rubber hands. They also
should be kept free of dirt and moisture.
Any cards in poor or doubtful condition should be replaced before processing begins.
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