B. E. P. Edu World

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TACHOMETER/STROBOSCOPE Model : BP-2259 ( 2 in 1, DIGITAL PHOTO TACHOMETER with DIGITAL STROBOSCOPE )  FEATURES * Intelligent, microprocessor circuit design, high accuracy, wide range, digital readout.* One instrument include two functions of "Digital Photo Tachometer " & " Digital Stroboscope"* Digital Stroboscope :Wide setting range from 100 RPM to 100,000 RPM, digital display with high accuracy. Modern solid state high visible orange light, long life, almost maintenance free. It is ideal for inspecting and measuring the speed of moving gears, fans, centrifuges, pumps, motors and other equipment used in general industrial maintenance, production, quality control, laboratories and as well as for schools and colleges for demonstrating strobe action.* Digital Photo Tachometer :No contact RPM measurement, wide measuring range from 0.5 to 100,000 RPM. 0.1 RPM resolution for the measured value < 1000 RPM. The last value, max., value, min. value can bestored into the memory automatically & be obtained by pressing " Memory Call Button ". Highvisible LCD display gives RPM reading exactly with no guessing or errors.* The use of durable, long lasting components, including a strong, light weight ABS plastic housing. Cabinet has been carefully shaped to fit comfortable in either hand.  GENERAL SPECIFICATIONS Display        5 digits, 10 mm ( 0.4" ) LCD Operation 0 - 50  (32 - 122 ). ( Liquid Crystal display ) with Temperature function annunciation. Operating Less than 80% RH.Accuracy     ± ( 0.1 % + 2 digit ). HumiditySampling Time    1 second ( 60 RPM ). Size            215 x 65 x 38 mm.Time base  :Quartz crystal. (8.5 x 2.6 x 1.5 inch). Circuit         Exclusive one-chip design Weight       300g(0.66 LB)/including battery. microprocessor LSI circuit.  AccessoriesCarrying case : 1 PC.Battery  : 4 x 1.5V AA ( UM-3 ) battery. Operation manual : 1 PC. ELECTRICAL SPECIFICATIONS ( PHOTO TACHOMETER ) Measurement Range   5 to 99,999 RPMResolution 0.1 RPM ( < 1,000 RPM ) 1 RPM ( 1,000 RPM )Photo Tach. detecting distance 50 to 150 mm/2 to 6 inch. * Typical max. 300 mm/12 inch depending upon ambient light. ELECTRICAL SPECIFICATIONS ( STROBOSCOPE ) Stroboscopic 100 to 100,000 FPM/RPM Flash tube High efficiency orange LED Flash Rate  FPM : flash per minute lamp.RPM : round per minute Flash Duration Approximately 60 to 1,000Flash Adjust 3 ranges : microseconds. Range  Range A: 100-1,000 FPM Flash color Orange Range B: 1,000-10,000 FPM Flash Duration Approx. 16% of period time. Range C: 10,000-100,000 FPM Flash Adjust Coarse adjust knob and Resolution 0.1 FPM/RPM. Knob Fine adjust knob.(Less than 1,000 FPM/RPM) Calibration Crystal time base and1 FPM/RPM microprocessor circuit, don't(Over 1,000 FPM/RPM) necessary take any external calibration process.   OPERATIONS PROCEDURES ( STROBOSCOPE ) Preparation Determine the range switch to " 1000 RPM " ," 10,000 RPM "  or" 100,000 RPM " position.Checking When checking speed, care must be taken to insure that the strobe is flashing inSpeed unison (one to one) with the object being monitored. A Stroboscope will alsostop motion at 2:1, 3:1, 4:1 et., this is normally referred to as harmonies.  To besure of unison, turn the dial until two images appear - this will double the actualspeed. Then lower the flashing rate until a single and stationary image appears -this is the actual true speed.Checking For motion analysis, simply locate the actual speed as mentioned above and thenMotion turn the dial slowly up or down. This will give a slow motion effect allowingcomplete inspection.