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Operation Guide 3550
You can also find information about operational
procedures at the CASIO website.
https://s.casio.jp/mw/en/3550/
EN-10
To set the alarm time
1. In the Alarm Mode, press A.
Hour setting
Minute setting
A
2. Press D to increase the flashing digits.
Holding down D changes the setting at high speed.
Press C to return to the Timekeeping Mode.
EN-12
Stopwatch
The Stopwatch Mode lets you measure
elapsed time. The range of the stopwatch is
59 minutes, 59.99 seconds.
Minutes: Seconds
1/100 second
To measure elapsed time
D
D
D
Start
Stop
Resume
EN-14
Specifications
Accuracy:
±30 seconds per month average.
Basic Functions:
Hour, minute, second, year, month, day, day of the week, a.m./p.m. (P)/24-hour
timekeeping
Full Auto Calendar (2000 to 2099)
Alarm:
Setting units: Hour, minute
Beeper: 20 seconds
Hourly time signal: Watch beeps every hour on the hour.
Stopwatch:
Measuring units: 1/100 second
Measuring capacity: 59 minutes, 59.99 seconds (60 minutes)
EN-16
A
Normal Alarm Mode
(No flashing)
D
A
Stop
Reset
Alarm
When the Daily Alarm is turned on, the alarm sounds for 20 seconds at the preset
time each day. When the Hourly Time Signal is turned on, the watch beeps every
hour on the hour.
The watch returns to the Timekeeping Mode automatically if you do not perform
any button operation for one or two minutes in the Alarm Mode.
To stop the alarm
Press any button to stop the alarm after it starts to sound.
To enable and disable the Daily Alarm and Hourly Time Signal
Press D while in the Alarm Mode to change the settings of the Daily Alarm and
Hourly Time Signal in the following sequence.
D
D
Both enabled
Both disabled
To test the alarm
Hold down D while in the Alarm Mode to sound the alarm.
Main Indicators
Number
Name
1
1
PM indicator
2
Stopwatch Mode
2
3
Hourly time signal on indicator
4
Alarm on indicator
3
4
Other:
LED light
Battery:
CR1216 x 1
Battery life: Approximately 2 years
Conditions:
– Alarm: Once (20 seconds)/day
– Illumination: Once (1.5 seconds)/day
Specifications are subject to change without notice.
EN-11
D
D
Daily Alarm only
Hourly Time
Signal only
EN-13
See
EN-8
EN-14
EN-13
EN-13
EN-15
EN-17
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