ONOSOKKIHigh Speed Digital Handheld TachometerHR-6800This is a non-contact, small handheld digital tachometer that can measure high-precision speed up to 999,990 r/min. The speed of high-speed rotating bodies such as the rotating body of dental machinery or the high-speed spindle of textile industry machinery, as well as the speed of the high-speed motor of the machine tool, can be measured by placing an electromagnetic sensor close to its rotating shaft. From the concave and convex shape of the teeth on the drill bit, it can be magnetized on general rotating machinery and the speed r/min can be displayed directly without contact. The range of this tachometer is very large, from 100 r/min to 999,990 r/min. It is equipped with analog output and pulse output as standard. The analog output can be recorded by a data recorder, etc., while the monitor output can be used to confirm the sensor waveform or analyze the input signal of the FFT analyzer. The pulse output can be used for tracking analysis signals of the FFT analyzer. In addition, there is a memory that can store 20 measurement results, which is convenient for confirmation and recording after measurement. Measurement objects Rotating spindles of dental machinery, rotating spindles of textile machinery, rotating bodies of high-speed machine tools (end mills, drills), etc. ※Part of the rotating part of the object to be measured needs to be magnetized. Applicable sensor MP-5350 Electromagnetic speed sensor (for high speed) (optional) Calculation method Periodic calculation method Display unit LCD, 5 digits, with backlight Measurement time 50 ms + input signal within 10 cycles Display update time 1 s / 0.5 s Switchable measurement unit × 10 r/min Range 100 to 999,990 r/min (range switchable) Measurement accuracy Display value × (±0.02%) ±1 count digit * Measurement accuracy of displayed value Storage function 20 measurement results can be stored in non-volatile memory (records are retained even when the power is OFF) Peak hold function Maximum value (MAX), minimum value (MIN) Overflow display When the measured value exceeds the display range, the overflow (ERROR mark) is displayed Speed upper limit alarm function When the speed exceeds the preset upper limit, the upper limit alarm (↑ mark) is displayed Trigger function Use the rotary potentiometer on the right side of the main body to adjust the output of the analog output relative to the speed display value Output voltage: 0 to 1 V / 0 to Full scale (Full scale can be set arbitrarily) Conversion method: 10-bit D/A Conversion linearity: ±1% / full scale output Update time: Within 50 ms + 1 cycle time Temperature stability: ±0.05% / full scale / °C (full scale and zero) Setting error: ±0.5% / full scale Load resistance: 100 kΩ or more Monitor output Analog output for monitor of sensor signal (switchable with the above-mentioned speed analog output) Pulse output One pulse output for each signal detection Output voltage: Hi +4.5 V or more, Lo +0.5 V or less Output logic: Positive logic Load resistance: 100 kΩ or more Operating temperature range 0 to +40°C Storage temperature range -10°C to +50°C Operating humidity range 35 to 85% RH (non-condensing) Storage humidity range 35 to 85% RH (non-condensing) Power supply AA batteries (1.5 V) × 4 or dedicated AC adapter PB-7090 (optional) Battery life Continuous use time: 10 hours or more (when backlight is OFF) Battery warning display Warning mark (LOW mark) is displayed when battery voltage is 4.4 V or less Dimensions 66 (W) × 189.5 (L) × 47.5 (D) mm Weight Approx. 250 g (including batteries) Accessories AA batteries (1.5 V) × 4 Carrying case MI-0301 Tripod mount adapter Options ・MP-5350 High-speed dedicated sensor ・AX-501 Output cable for BNC connector (2 m, for analog pulse) ・HT-0522 Magnetic stand (for use with HT-0521B measurement fixture) ・HT-0521B Measurement fixture (for use with HT-0522 Magnetic stand) ・PB-7090 AC adapter