Agilent 1956-11 free download

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HEWLETT-PACKARD JOURNAL TECHNICAL INFORMATION FROM THE -dp- LABORATORIES Vol. 8 No. 3-4 BLISHED BY THE HEWLETT-PACKARD COMPANY, 275 PAGE MILL ROAD, PALO ALTO, CALIFORNIA NOV.-DEC, 1956 A New Adjustable Gate Time Counter from a New -hp- Affiliate FOR some time there has been in operation for such work, it has been designed so that a new -fip- affiliate which has now devel panel controls can select any desired sampling oped a new counter for the many mechanical interval (gate time) from 0.1 millisecond to and industrial applications such as tachom- 0.9999 second in 0.1 millisecond steps1-2. In etry and fuel flow measurements to which practical terms this means that the instrument electronic counters bring increased accuracy will introduce into the measurement a calibra and speed of measurement. tion constant such that the measured quantity The new -hp- affiliate (Dynac, is displayed directly in any desired units such Inc.) is described in another as rpm or rps, gallons/hour or minute, gal article in this issue. lons/revolution, revolutions/revolution, etc. The new -dy- Model 2500 counter has been The adjustable gate time feature further en specifically designed to display in illuminated ables changes in any of these quantities to be numerals the values metered by transducers of read directly on a percentage basis, i.e., so that the type that converts physical quantities to the counter displays the measured quantity as proportional electrical frequencies. Such trans a percentage of its original value. ducers include flow meters, tachometer gener 'The counter is also available with gate times up to 9.9999 seconds for applications where higher resolution measure ators, and pressure transducers as well as many ments are desired or where slow speed phenomena are to