[. . . ] ­ EL back light. 54 3 How to operate the watch 3. 1 Backlight Press S4 to activate the EL back light for 3 seconds. 3. 2 Key functions S1 (START/SPL) ­ SHOW DATE ­ RE-LINK WATCH AND TRANSMITTER ­ START/SPLIT OF STOPWATCH ­ ADJUST SETTING (SET) S2 (STP/RST/SET) ­ SET (PRESS AND HOLD) ­ STOP/RESET OF STOPWATCH ­ EXIT (SET) S3 (MODE) ­ MODE CHANGE ­ SELECT SETTING (SET) S4 EL BACK LIGHT. THE BACKLIGHT REMAINS ACTIVE FOR 3 SECONDS OR AS LONG AS YOU PRESS THE KEY. [. . . ] DURING THIS TIME, OTHER KEYS MAY BE PRESSED. 55 3. 3 Operating Modes Press S3 for mode change operation. The sequence is shown as follow: 3. 4 Set the training zones To use the heart rate measuring function with the training zones, follow these steps: (1) Enter data for heart rate monitor 56 ­ Press S3 to show Pulse mode, mode prompt "PULS" will be displayed for 1 second first. ­ Press and hold S2 for 1 second ("Hold" displayed) to enter setting mode. The sequence is shown as follow: ­ When setting sound on/off, press S1 to toggle the zone alarm on or off. ­ After all adjustments are completed, press S2 to exit setting mode. If zone alarm is set to "on", 1 "Beep" sound will be given every 6 seconds when heart rate is below "Zone Low Limit" and 2 "Beep" sounds will be given every 6 seconds when heart rate is above "Zone High Limit". Both "Zone High Limit" and "Zone Low Limit" can be set from 40 to 240 BPM (Beat Per Minute). If there is no button operation for 2­3 minutes in setting mode, the watch will return back to Pulse mode automatically. 57 (2) Equipping the transmitter (chest strap) ­ Wet the grooved electrode areas of the transmitter with water. To re-link, press S1, and "---" will start flashing or heart rate will be shown. 61 2. The chronograph is of 1/00-second resolution for the first hour and 1-second resolution for the rest and with working range up to 24 hours, then the chronograph stop automatically. If zone alarm is set to "off", there will be no zone alarm and high/low limit indication. 3. 7 Set the time ­ Press S3 to show Time mode, mode prompt "TIME" will be displayed for 1 second first. ­ Press S1 and date display (showing weekday, month and day) will be shown for 5 seconds and then return to Time mode automatically or when S1 is pressed. 62 ­ Press and hold S2 for 1 second ("Hold" displayed) to enter setting mode. ­ Press S3 to select the next digits, weekday or 12/24Hr for setting. The sequence is shown as follow: 63 ­ Year can be set from 2000 to 2039. ­ When setting 12/24Hr, press S1 to toggle 12-hour or 24-hour display formats. [. . . ] The sequence is shown as follow: 63 ­ Year can be set from 2000 to 2039. ­ When setting 12/24Hr, press S1 to toggle 12-hour or 24-hour display formats. If 24-hour display format is selected, there will be no "PM" flag. [. . . ]