4.23 DESIGN REQUIREMENTS FOR WEIGHING SYSTEMS
4.23.1 Specific Design Requirements
4.23.1.1 All surfaces in the product zone shall be readily accessible
or removable for cleaning.
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4.23.1.2 Rollers, pulleys, sprockets, and trolley wheels shall
be free of end recesses.
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4.23.1.3 Horizontal surfaces should be kept to a minimum.
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4.23.1.4 Surfaces of castings shall be free of coarse impressions
or holes. Part or pattern numbers, if used, shall not form pocket
patterns or areas difficult to clean.
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4.23.1.5 Enclosures for scale operating mechanism should minimize
the entry of dust and moisture. Openings of such size and location
shall be provided to permit access to all internal surfaces that
require periodic inspection or cleaning. Covers or doors for these
access openings shall be removable or hinged.
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4.23.1.6 All flat scale platforms shall be provided with an apron
overhang or drip lip, to protect the under surface and parts from
spillage.
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4.23.1.7 The indicator face cover shall be shatter-resistant,
sealed and free of ledges.
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4.23.1.8 The indicator face cover retaining mechanism shall exclude
dust and moisture, and must not create grooves or recesses that
will retain product residues and other contaminants.
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