METRIC
A-A-50503A
12 June 2002 SUPERSEDING A-A-50503
28 February 1992
COMMERCIAL ITEM DESCRIPTION
SCALE, BALANCE, BEAM INDICATING: METRIC, 2610 GRAM CAPACITY The General Services Administration has authorized the use of this
commercial item description for all federal agencies.
1. SCOPE. This commercial item description (CID) establishes the government acquisition requirements for a 2610 gram capacity beam indicating balance scale.
2. CLASSIFICATION. The scales shall be classified by the styles listed below. The selected style to be supplied shall be specified in the acquisition order (see 7.4(b)).
Style A - Flat plate receiver Style B - Pan type load receiver Style C - Scoop type load receiver
3. SALIENT CHARACTERISTICS
3.1 Components. The scales shall be of the triple beam type and of the following components.
3.1.1 Base. The base shall be a sturdy metal casting with a moisture and acid resistant finish. The base shall be equipped at the beam end with a post, graduated as required, to provide a definite and clear zero position and to indicate an out-of-balance condition. The post shall be equipped with stops so located as to permit a total weight beam travel between the stops of not less than 10 millimeters (mm). The base shall be formed with smooth rounded surfaces to prevent undue accumulation of dust or spilled material.
3.1.2 Weight beam. The weight beam shall consist of three bars: a 500 gram capacity beam notched at 100 gram intervals, a 100 gram capacity beam notched at 10 gram intervals, and a
10 gram capacity, front, smooth, fractional bar graduated in increments of 0.1 gram. The individual beam shall be tiered from front to rear to increase scale readability and poise visibility. The weight beam shall be equipped with a threaded zero adjusting nut at the loading end. Means shall be provided to dampen beam oscillations after application or removal of a load.
Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to: Defense Supply Center Richmond (DSCR), ATTN: DSCR-VBD, 8000 Jefferson Davis Highway, Richmond, VA 23297-5610.
AMSC N/A FSC 6670
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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