Select Menu > Organiser > Calculator and, from theavailable options, the calculator type and the operatinginstructions.This calculator has limited accuracy and is designed forsimple calculations.Countdown timerNormal timer1. To activate the timer, select Menu > Organiser >Countd. timer > Normal timer, enter a time, andwrite a note that is displayed when the timeexpires. To change the time, select Change time.2. To start the timer, select Start.3. To stop the timer, select Stop timer.Interval timer1. To have an interval timer with up to 10 intervalsstarted, first enter the intervals.2. Select Menu > Organiser > Countd. timer >Interval timer.3. To start the timer, select Start timer > Start.To select how the interval timer should start the nextperiod, select Menu > Organiser > Countd. timer >Settings > Contin. to next period and from theavailable options.StopwatchYou can measure time, take intermediate times, or takelap times using the stopwatch.Select Menu > Organiser > Stopwatch and from thefollowing options:● Split timing — to take intermediate times. To resetthe time without saving it, select Options >Reset.● Lap timing — to take lap times● Continue — to view the timing that you have setin the background● Show last — to view the most recently measuredtime if the stopwatch is not reset● View times or Delete times — to view or deletethe saved timesTo set the stopwatch timing in the background, pressthe end key.52 Organiser