Technical information

Chronometer

As a heart of our chronometer was used PLC Siemens type S7-200 with CPU 212, powered from power supply Simens PS-307 (24V / 5A). Beginning and the end of time measuring was detected as an interruption of the ligt in optical sensor Visolux GLV 18-8-KK-1379/25/46. Sensor contains the source of modulated light, return path was realised with reflecting glasses. Resulted time interval was transfered to the computer. Creator of the chronometer is student Mr. Michal Semancik.

Fig. 10. . Michal Semancik and its chronometer

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