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Countdown Timer - Casio GA100-1A1 Operation Manual

Casio ga100-1a1: user guide
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Operation Guide 5081
To specify a distance value
1. In the Stopwatch Mode, make sure the stopwatch is
stopped and reset to all zeros.
• If you need to reset the stopwatch to all zeros, press A.
2. Hold down A for about three seconds until the watch
beeps, DIST (
l
and the left digit of the current distance value setting
flashes in the lower left display.
• This is the distance value setting mode.
3. Press C to move the flashing between the values on
the left side and right side of the distance value digit
decimal point.
4. While either the left or right distance value is flashing,
use D (+) and B (–) to change it.
• You can specify a distance value in the range of 0.1 to
99.9.
5. After specifying the distance value you want, press A
to exit the setting mode.
How speed is indicated
• While an elapsed time measurement operation is being
Speed hand
performed in the Stopwatch Mode, the watch will display
OVER
Upper
a speed value, which is calculated based on the
right dial
distance you specified and the elapsed time. The speed
is indicated by the upper right dial, two indicators (1000
and MACH), and the speed hand.
• The upper right dial indicates the 100s digit value.
• 1000 appears when the speed exceeds 1,000.
• MACH appears when the speed exceeds 1,226.
• The speed hand indicates speed values less than 100.
Only even-numbered values are indicated.
Example:
Mach (MACH)
At a speed of 1,740, the upper right dial indicates 1000
and MACH is displayed.
Speed (1000)
The upper right dial indicates 700.
The speed hand indicates 40.
• Speed can be indicated from 0 to 1998. OVER is
indicated by the speed hand when the speed exceeds
1998.
Time Measurement
You need to specify either lap time or split time measurement before you start a
stopwatch operation.
• If you want to measure total elapsed time, select split time measurement.
To specify lap time or split time readings
1. In the Stopwatch Mode, make sure the stopwatch is stopped and reset to all zeros.
• Make sure that
(lap times) or
LAP
SPL
display.
• If you need to reset the stopwatch to all zeros, press A.
2. Press A to toggle between
LAP
(lap times) and
display.
A
Elapsed Time Measurement
Use the following procedure to measure elapsed time, without taking lap time or split
time readings.
To perform elapsed time measurement
Select split time (
SPL
) measurement and then perform the following button operations.
D Start ➝ D Stop ➝ A Reset
• If you have a distance value specified for the current elapsed time measurement, the
upper right dial and speed hand will indicate the overall speed when you press D to
stop the elapsed time operation.
• After pressing D to stop an elapsed time operation, you could press D again to
restart from the point where you left off.
Lap Time
A lap time reading shows the time elapsed since the last
lap time reading was taken.
• If you want the watch to calculate the speed of each lap
(when all of the laps are the same distance), specify the
lap distance for the distance setting.
• If you want the watch to calculate the speed of the entire
race, specify the race distance for the distance setting. A
speed will be indicated each time you take a lap
Lap time
reading, but these lap speeds will not indicate actual
speed of the entire race.
To set up the stopwatch to take lap time readings
1. In the Stopwatch Mode, make sure the stopwatch is stopped and reset to all zeros.
• If you need to reset the stopwatch to all zeros, press A.
2. Make sure that
LAP
(lap times) is shown in the lower right display.
• If
(split times) is displayed, press A to toggle it to
SPL
To perform a lap time measurement
Select lap time (
Speed
following button operations.
(calculated)
Lap number
D Start ➝ A Lap* ➝ A Lap* ➝
D Stop ➝ A Reset
* The lap time is released automatically in about 12
seconds.
• You can press A to take lap readings as many times as
you like. The LAP indicator flashes while a lap reading is
displayed.
• A lap number (#01 through #99) alternates with the lap
Minutes
Seconds
hour value in the lower right display while a lap time
reading is displayed. If you take more than 99 lap
1/1000
LAP
readings, the lap number will restart from #00 following
seconds
indicator
lap #99.
• Pressing D to stop elapsed time measurement displays
the time (and speed if a distance is specified) of the final
lap.
) appears in the lower right display,
(split times) is shown in the lower right
SPL
(split times) in the lower right
LAP
.
LAP
) measurement and then perform the
Split Time
A split time reading shows the time elapsed since the
beginning of the current time measurement.
• If you want the watch to calculate the speed of the race,
specify the race distance for the distance setting.
• For split time readings, you can specify the total race
distance only. Though the watch will indicate a speed
each time you take a split reading, they will be based on
Split time
the total race distance, and so they will not indicate
actual intermediate split speeds.
To set up the stopwatch to take split time readings
1. In the Stopwatch Mode, make sure the stopwatch is stopped and reset to all zeros.
• If you need to reset the stopwatch to all zeros, press A.
2. Make sure that
SPL
(split times) is shown in the lower right display.
• If
(lap times) is displayed, press A to toggle it to
LAP
To perform a split time measurement
Select split time (
Speed (calculated)
the following button operations.
D Start ➝ A Split ➝ A Split Release* ➝
D Stop ➝ A Reset
* The split time is released automatically if you do not
press A within about 12 seconds.
• You can press A to take split readings as many times
as you like. The SPLIT indicator flashes while a lap
reading is displayed.
• The stopwatch continues elapsed time measurement
Minutes
Hour
internally while a split time reading is displayed.
Seconds
1/1000
Pressing A to release the split will switch the lower left
seconds
display to the elapsed time measurement, or you also
could press D to stop elapsed time measurement
SPLIT indicator
instead.
• Pressing D to stop elapsed time measurement displays
the time (and speed if a distance is specified) of the final
split (which is the overall elapsed time).
To measure times with the stopwatch
Elapsed Time
D
D
A
Start
Stop
Reset
Lap Time
D
A
A
Start
Lap
Lap
(
LAP
displayed)
(Lap01)
(Lap02)
Split Time
A
D
A
Start
Split
Split release
(
SPL
displayed)

Countdown Timer

You can set the countdown timer start time within a range
Auto-repeat off
of one minute to 24 hours. An alarm sounds when the
countdown reaches zero.
• You also can select auto-repeat, which automatically
restarts the countdown from the original value you set
whenever zero is reached.
• All of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
C.
Start time
(Hours
Minutes)
Seconds
To use the countdown timer
Press D while in the Countdown Timer Mode to start the countdown timer.
• When the end of the countdown is reached, the alarm will sound for 10 seconds or
until you stop it by pressing any button.
• The countdown time is reset to its starting value automatically after the alarm stops
if auto-repeat is turned off.
• When auto-repeat is turned on, the countdown will restart automatically without
pausing when it reaches zero.
• The countdown timer measurement operation continues even if you exit the
Countdown Timer Mode.
• Press D while a countdown operation is in progress to pause it.
Press D again to resume the countdown.
• To stop a countdown timer operation completely, first pause it (by pressing D), and
then press A. This returns the countdown time to its starting value.
To configure countdown start time and auto-repeat settings
1. While the countdown start time is on the display in the
Countdown Timer Mode, hold down A for about three
seconds until the hour setting of the countdown start
time starts to flash. This is the setting mode.
• If the countdown start time is not displayed, use the
procedure under "To use the countdown timer" to
display it.
2. Press C to move the flashing in the sequence shown
Start time
below, and select the setting you want to change.
(Hours
Minutes)
Start Time
Auto-repeat on
(Hours)
3. Perform the following operations, depending on which setting currently is selected
on the display.
• While the start time setting is flashing, use D (+) and B (–) to change it.
• While the auto-repeat on/off setting is flashing on the display, press D to toggle
auto-repeat on (
) and off (
).
4. Press A to exit the setting mode.
• The auto-repeat on (
) is displayed on the Countdown Timer Mode screen while
this function is turned on.
SPL
.
SPL
) measurement and then perform
D
A
Stop
Reset
D
A
Stop
Reset
Start Time
Auto-Repeat
(Minutes)
On/Off
2

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