National Geographic NG730 series User manual

WATCH
COLLECTION
NG730 SERIES
INSTRUCTION
MANUAL

MAIN PARTS AND INDICATORS
WATCH SPECIFICATIONS
Movement caliber: ISA 8172/220; three jewels; Height: 4.20 mm
Battery: Silver oxide SR927W or equivalent
Battery life: Approximately 57 months
Water-resistance: 100 ATM/1,000 m/3,300 ft
Hour hand
Chronograph hand
1/5 second
Day indicator Date window
Push button B: split/reset
Push button A: start/stop
Minute hand
2nd positioncrown 1st position
Second hand
30 minute totalizer
1

A) SETTING THE TIME
- Unscrew the crown and pull it out to the second position.
- Turn the crown to set the hour and minute hands.
- Push the crown back to its original position and screw down.
B) SETTING THE DAY
- Unscrew the crown and pull it out to the second position.
- Turn the crown to advance or rewind 24 hours from the day being
changed. For example, if the current day is Tuesday and the correct
day is Wednesday, advance the time 24 hours until the day indicator
changes to the correct day.
- Push the crown back to its original position and screw down.
SET
SET24 hr
2

C) SETTING THE DATE
- Unscrew the crown and pull it out to the first position.
- Turn the crown clockwise to set the date.
- Push the crown back to the original position and screw down.
Caution: Avoid correcting the date between 9:00 p.m. and 12:30 a.m.
D) CHRONOGRAPH
Mode 1
Note: After five and a half hours of continuous running, the chronograph
stops and resets automatically to save battery life.
- Unscrew and press push button A to start and stop the chronograph
count.
- Unscrew and press push button B to reset the chronograph to zero.
RESETSTART STOP
SET
3

Mode 2 - Measuring Split Times
- Unscrew and press push button A to start the chronograph count.
- Unscrew and press push button B to stop the count and activate the
split time function. The watch keeps counting the elapsed time in the
background.
- Press push button B again to restart the count. The chronograph hand
will advance to add the time elapsed after the split time was activated.
- Press push button A to stop the chronograph count.
- Press push button B to reset the chronograph to zero.
CHRONOGRAPH CALIBRATION
Note: This step is to be followed after the battery has been exchanged or
the chronograph has been mishandled (when after resetting, the
chronograph hand will not default to zero).
- Minute hand calibration: Press push buttons A and B simultaneously.
Press button B repeatedly until the 30 minute hand sub dial is on 30.
- Second hand calibration: Press push button A repeatedly until the
chronograph hand is on zero.
- Press push buttons A and B simultaneously to exit. Screw down push
buttons.
4

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