stopwatch are two main ↓&εtypes of machinery and el× <♦ectronic, electronic€ §✔ watch and can be divided int☆≠σo two categories, three butt₩≥§↔ons and four buttons. The vast majo₩♦​rity of PE teachers use more is ∏¶electronic stopwatch, mechanical sto©₹£&pwatch in many places have become histo↑σry. Electronic stopwatch is a kin¶δ'<d of advanced electronic€ σ timer, domestic electronic seco™<nds are generally use the oscilla→♦λ'tion frequency of the qua♦>λrtz oscillator as a time re®σ×ference, adopt six LCD digital dβ×δ←isplay, display intuitive, easy♥< to read, function m£¥ ±ore advantages. The author talk about u↕¶¥sing and maintenance of γ±‌•electronic stopwatch time feel (in↑α four key electronic stopwatcδ Ωh as an example).

1. Record a time: in the case of '​timer displays, press MODε'E key to choose, can appear th↓σe stopwatch function. Press¶₽↔ the START/STOP button☆♦< to START automatic meter secΩ>€onds, press the STOP meter ←§ seconds again, show the me‍'←✘ter data. LAP/RESET '↓button, then the automatic zero.

2. Record multiple t★☆ ime: if you want to record mulΩ↓tiple objects at the same time, but≥↔π↔ don't reach the finish α×line at the same time, the move↔≈÷ment of timing function more 'πways can be used (the specific numb φer of records to table the×✘ instructions). The first press START/S®λTOP the stopwatch conditions♠¥₽, a stopwatch to automatic ‍♠≠meter seconds, press the LAP to obj↑©≥ect to the finish/RESET, th±×e number of seconds t​'←o STOP according to different o ≥bjects, and displayed on thק∏↓e screen above. The stβ§>©opwatch is still in the recordΩ‌‍β, the internal circuit c←'ontinues to accumulate meter seconds↓"€ behind the object. All¥ε objects record after the '★completion of the norma↑★l STOP watch, according to the RECALL c∑↓✘₩an check in the previous re↑₩λcord, up-and-down availabl✘♠♠‌e START/STOP and LAP/RESET button.

3. The adjustment of the time, date, t≥$♠ime and date of calibration and a₹β★djustment if needed, can pres↕ ↑σs MODE key, to display t<±he digital meter seconds, minutes and s‌≥econds, hold RECALL button for 2 ≈<☆±seconds after see digita→ l flicker can choose a₹↔djustment, until sho‍≈↕×ws that need to be adα≥↕<justed by the correct number of s★Ω♥λeconds, and then press →§•¥the RECALL button.

Matters needing attention€‌÷®.

1. Keep the battery change r §¶egularly, generally in displaφ≠♣y dimming can be repl€✘δ∑aced, don't wait for​€♣₹ the electronic stopα☆>₩watch to replace its battery runs o× ₽ ut.

2. The electronic stopδα≈watch placed at ordinary ti≤↔"mes, safe environment to∑≥ dry, moisture, shock,≥  anticorrosion, fire prevention, et"≤£c.

3. Avoid putting stuff o>"δn the electronic stopwatch.

4. Not sure of the situation, don®$→9;t open to repair, sh"δ♥ould send professional maintena£σ≈★nce.