| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage battery discharge characteristic measuring apparatus which does not require any addition or changeover of a conducting circuit, maintains a high setting resolution in a wide current setting range, and is provided with a high safety for monitoring the soundness of the apparatus continuously and protecting it. SOLUTION: A current driving circuit 10 is equipped with parallel-connected electromagnetic switches 20A-20D, and current driving units 30A-30D having weighted current setting ranges. A microcomputer 40 determines on-off patterns according to target current set values and outputs on-off signals A-D; and outputs set values for digital-to-analog converters calculated by the target current set values, the gains of the digital-to-analog converters, and the setting resolution to the digital-to-analog converters 50. The digital-to-analog converters 50 convert the set values for the digital-to-analog converters into current set signals and output them to the driving units 30A-30D. A driving current regulated to each current set signal level flows in each current driving unit 30 connected to a battery to be measured 1 by each electromagnetic switch 20 in a closed state. COPYRIGHT: (C)2005,JPO&NCIPI
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