stopwatch are two maε≠​"in types of machinery a®₹nd electronic, electroni&≥★c watch and can be divided i∏♠✔nto two categories, three ≤✘‌‌buttons and four buttons. The va€$φ€st majority of PE teachers u₹₹δ‍se more is electronic stopwat∑≈'≥ch, mechanical stopwatch in many places₩&σ have become history. £©>Electronic stopwatch is a ₹✔kind of advanced electr₽≈ελonic timer, domestic electroni• ¶≥c seconds are generally use the o™©scillation frequency of th↕♥♠↓e quartz oscillator as a time referenc✔ γe, adopt six LCD digital disp₩×lay, display intuitive✔©, easy to read, function more"γ‌ advantages. The author talk about usin׶g and maintenance of electronic stop÷£watch time feel (in fourβ≈∑₽ key electronic stopwatch as an exampl"ε↑e).

1. Record a time: in↓λ the case of timer displays, press ≤λMODE key to choose, ca↔ ©n appear the stopwatch func✔ γπtion. Press the START/STOP butt£  ↔on to START automatic meter seconds, pr←♠≥ess the STOP meter seconds a±¶ gain, show the meter data. LAP/RESET b↓₹πutton, then the automatic zero.

2. Record multiple time: if you w←€ant to record multiple object•₽'s at the same time, but do♥"n't reach the finish line at theσ₩™σ same time, the movement of tΩ∏ &iming function more ways can be used¶"÷≥ (the specific number of reπ"™↑cords to table the instructions). The ∑£first press START/STOP  ©α£the stopwatch conditions, ©&≥a stopwatch to automatic meter Ωσseconds, press the LAP to object $↔÷to the finish/RESET,←π♥ the number of seconds to STOP accordinε∞g to different objects,♠ ™ and displayed on the screen above₩®$×. The stopwatch is still in the ♣×&record, the internal circuit contin♣ ÷ ues to accumulate meter seconds ®¥πbehind the object. All ob™β®jects record after the completi☆≥on of the normal STOP watch, ac•®cording to the RECALL can check in t‌&he previous record, up-a±₩¶πnd-down available START‌≤/STOP and LAP/RESET b✔±§λutton.

3. The adjustment of the time, dat♥←e, time and date of calibr∏>ation and adjustment if needed, can pr÷≈φess MODE key, to display the♣← digital meter seconds, m★₽inutes and seconds, ho♠₽πld RECALL button for♦↔§• 2 seconds after see digita©​l flicker can choose adjus✘πΩtment, until shows that nee₹βd to be adjusted by the correct num©★♥ber of seconds, and then ✘✔press the RECALL button.

Matters needing attention.

1. Keep the battery change r•≤egularly, generally in display dimming "​‍can be replaced, don'↔€t wait for the electronic stopwatch to•₩× replace its battery ✔ runs out.

2. The electronic stopwatch plac♣&&ed at ordinary times, safe ‌≤environment to dry, moisture, shφ‍ ock, anticorrosion, fire pr $♥®evention, etc.

3. Avoid putting stuff on the eleε♣€©ctronic stopwatch.

4. Not sure of the situation÷δ σ, don't open to repair, sho>↓uld send professiona‍♦←<l maintenance.