* The effects of changes in temperature (per 10°C) are as shown below.
Altitude: Max. 120 m / Barometric pressure: Max. 12 hPa
* Guaranteed accuracy temperature range: -20°C to +40°C
5. Temperature measurement accuracy : Displayed value ±3°C
6. Watch operating temperature range :
-
20°C to +60°C
7. Display Functions
• Time: Hours, minutes seconds
• Calendar: Date, day (year and month displayed only during setting)
• Alarm: Hours, minutes, ON/ OFF
• Chronograph: Hours, minutes, seconds, 1/100 seconds, split time (24 hour
register)
• Log memo: Log data of four most recent dives; number of dive, dive date,
dive starting time, maximum depth, dive time, average depth, minimum
water temperature
• Depth alarm: 1 to 80 m (1 m units), number of times alarm sounds (0
-
5
times or continuously)
• Dive time alarm: 5 to 95 minutes (5 minute units)
• Altitude memo: Maximum of 6 points can be stored in memory as altitude
memos; point number (1 through 6), memo date, memo time (hours, min-
utes), altitude, barometric pressure, temperature, and altitude and temper-
ature differences (as compared with the previous memo)
• Surface mode: Measurement of elapsed time after diving (24 hour time-
keeping system)
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24. Specifications
1. Model : C900
2. Timekeeping accuracy : Within ±20 seconds per month (when worn at nor-
mal temperatures of +5°C to +35°C)
3. Water depth measurement accuracy : ±(3% of displayed value +30 cm), pro-
vided that the working temperature is constant
* Guaranteed accuracy temperature range: +10°C to +40°C (the
accuracy of water depth measurement is affected by changes in
the temperature at which the watch is worn)
4. Altitude / barometric pressure measurement accuracy
Accuracy when measured at a constant temperature:
Altitude:Altitude of 3000 m or less above sea level: ± (5% of altitude differ-
ence + 10 m)
Altitude of 3001 m or more above sea level: ± (8% of altitude differ-
ence + 10 m)
* Altitude measurement accuracy is the relative accuracy when
measured based on standard atmosphere after correcting altitude.
Barometric pressure : Altitude of 3000 m or less above sea level: ± (5% of
barometric pressure difference + 1 hPa)
Altitude of 3001 m or more above sea level: ± (8% of barometric
pressure difference + 1 hPa)
* Only use the display of barometric pressure as a rough indicator
for determining changes in barometric pressure.
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