Service Manuals, User Guides, Schematic Diagrams or docs for : Agilent journals 1956-11

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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
                                                                                       be measured.
         telemetering systems.                                                        2 A special form of this counter with 18 preset gate times for
                                                                                       the 18 RDB FM/FM channels is also available. See second
            To make the -dy- 2500 especially suitable                                  article in this issue.




                                                                                                                                          PHOTO-ELECTRIC
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