Select Options to select the calculator type or to view the operating instructions.This calculator has limited accuracy and is designed for simple calculations.Countdown timerSelect Menu > Applications > Countd. timer.Normal timer1 Select Normal timer, enter a time, and write a note that is displayed when the timeexpires.2 Select Start.Interval timerTo have an interval timer with up to 10 intervals started, do the following:1 Select Interval timer.2 Select Start timer > Start.To select how the interval timer should start the next period, select Settings > Cont.to next period.StopwatchYou can measure time, take intermediate times, or take lap times using the stopwatch.Select Menu > Applications > Stopwatch and from the following:Split timing — Take intermediate times. To reset the time without saving it, selectOptions > Reset.Lap timing — Take lap times.Continue — View the timing that you have set to the background.Show last — View the most recently measured time if the stopwatch is not resetView times or Delete times — View or delete the saved timesTo set the stopwatch timing to the background, press the end key.Green tipsHere are tips on how you can contribute to protecting the environment.56 Green tips