Automatic Apparatus for Intermittent Testing (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Automatic Apparatus for Intermittent Testing

The usual tests of dry cells which are made at the present time are arbitrary. They involve the discharge of the cells through resistances for varying periods of time, depending upon the service for which the particular cells are designed. The telephone test, frequently referred to as the A. T. And T. Test, consists of a discharge of 3 cells in series during 4 minutes per hour for 10 consecutive hours a day, but omitting every other discharge period on 1 day of the week. The ignition test for cells which are designed for a heavier type of service involves a discharge of the group of cells for r-hour periods twice each day. The flash light test requires a discharge of the cells for 5 minutes once during 24 hours. The details of these tests may be found in Circular No. 79, Electrical Characteristics and Testing of Dry Cells, published by the Bureau of Standards.

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