J12007-2 4 Digits Display Storage Digital Timer Labware 10 Sets Data

Model J12007-2 store digital timer is a with measuring interval time, measuring cycle, measuring collision experiment time data, measuring 3 groups of acceleration time data, and measuring 4 groups of free fall experiment time data and gravity. 10 groups of data storage that six feature intelligent precision digital instrument. It is a common instrument designed for school physics teaching experiment, it is generally with the air track and the small gas source supporting the use; Instrument can also with the oblique groove track, free fall experimental instrument and other equipment supporting the use to complete ordinary physical mechanics experiment. Instrument due to the use of smart microcontroller technology, and applications using C language, using the photoelectric sensor parts, LED digital display, makes the instrument with measurement accuracy, intelligent conversion correct, low power consumption, strong anti-interference, showing the clear number, intuitive and easy to use extremely. The whole machine use the PCB and wire binding process, contact good and easy maintenance.
Main Technical Performance: 2-1, Time base: 0.1ms, 1ms, 10ms, Hand / Auto time base conversion. 2-2, Interval time measurement range: S2 0 ~ 9999 s. 2-3, Cycle measurement range: T 0 ~ 9999 s. 2-4, Collision experiment time measurement range: Pz (match air track), 0 ~ 9999 s. 2-5, Acceleration measurement range: a (match air track), 0 ~ 9999 s. 2-6, Free fall experiment time measurement range: 0 ~ 9999 s. 2-7, Acceleration of gravity: g Default use 22mm steel ball. (match oblique groove track and free fall experimental instrument).
2-8, Store data range: 1 ~ 10 groups of data. 2-9, Display: 4 LED digital tube. 2-10, Instrumental error: ≤ ± 0.1%. 2-11, Visible distance:> 10 meters. 2-12, Experiment control method: photoelectric sensor conversion, electromagnetic absorb and release control. 2-13, Working environment: 2-13-1, Temperature: 0 ℃ ~ 40 ℃. 2-13-2, Relative humidity: ≤ 85%. 2-14, Power supply: 220V ± 10%, 50Hz. 2-15, Power consumption: ≤ 5VA. 2-16, Working hours: continuous.
Circuit Description: The instrument is mainly composed of intelligent control circuit P89C52 microcontroller CPU, with a variety of functions from the C language function program on physical analog to digital data processing, the final instructions from the LED composed of specific physical quantities. Instruments data acquisition mainly by photoelectric sensor conversion circuit, shaping circuit. Power circuit is a step-down transformer to 9 volts, and then from D1 ~ D4 form a full-wave rectifier, filtered by the capacitor C1 sent IC3 three-terminal regulator to generate 5V voltage for the entire machine.
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