Casio Watch 1874 1 User Manual

Module No. 1874  
1874-1  
GENERAL GUIDE  
Stopwatch Mode  
Countdown Alarm Mode  
PA INTERVAL  
PA  
PA INTERVAL  
PA  
Press C to change from mode to mode. Each mode is explained in detail on the  
following pages.  
After you perform an operation in any mode, pressing C returns to the Timekeeping  
Mode.  
PA INTERVAL  
PA  
PA INTERVAL  
PA  
While in any mode hold down C for 2 seconds, to enter the Dive Time Measurement  
Mode.  
24  
A
24  
A
RECALL AUTO SPL DATA  
RECALL AUTO SPL DATA  
Dive Time Measurement Mode  
Hold down  
Timekeeping Mode  
Alarm Mode  
PA INTERVAL  
PA  
A
C for 2  
PA INTERVAL  
PA  
B
seconds.  
PA INTERVAL  
PA  
24  
A
P
P
24  
A
D
C
RECALL AUTO SPL DATA  
RECALL AUTO SPL DATA  
Before Diving/Snorkeling  
TIMEKEEPING MODE  
Be sure to check if the battery power is low (check for low light intensity or a dim  
display). If it is, do not use the watch for diving/snorkeling.  
Make sure that the watch is set to the correct time of day.  
Check the glass, case and band for cracks or chips.  
In the Timekeeping Mode, press B to illuminate the  
Day of week  
Day  
display.  
Month  
A
Make sure that the band is fastened securely around your wrist.  
To set the time and date  
PA INTERVAL  
PA  
B
D
1. Press A while in the Timekeeping Mode. The seconds  
digits flash on the display because they are selected.  
2. Press C to change the selection in the following  
sequence.  
While Diving/Snorkeling  
24  
A
P
Always use the “buddy system” when diving — never dive alone.  
Check to make sure that timer operation is being performed properly.  
Take care when diving/snorkeling near rocks or coral to avoid scratching the  
watch.  
C
RECALL AUTO SPL  
Hour  
Minutes  
Seconds  
12/24-Hour  
Format  
Minutes  
Seconds  
Hour  
After Diving/Snorkeling  
PM indicator  
To avoid corrosion, rinse your watch thoroughly with fresh water to remove salt  
water, dirt, etc. (When possible, soak the watch in fresh water overnight to make  
sure that all salt is removed.)  
Day  
Month  
Year  
3. While the seconds digits are selected (flashing), press D to reset them to 00. If you  
press D while the seconds count is in the range of 30 to 59, the seconds are reset to  
00 and 1 is added to the minutes. If the seconds count is in the range of 00 to 29, the  
minutes count is unchanged.  
4. While any digits (besides seconds) are selected (flashing), press D to increase the  
selection. Holding down D changes the current selection at high speed.  
The 12/24-hour setting is selected (flashing), press D to switch between the 12-hour  
1( 2H) and 24-hour (24H) formats.  
With the 12-hour format, the P (PM) indicator appears to the left of the hour digits for  
times in the range of noon to 11:59 pm and the A (AM) indicator appears to the left of  
the hour digits for times in the range of midnight to 11:59 am.  
The 24-hour format is indicated by 24 on the display. Times are shown in the range of  
00:00 to 23:59.  
To use the Dive Time Measurement Mode  
1. Before diving/snorkeling, switch to the Dive Time  
Measurement Mode by holding down C for at least  
Dive start time  
two seconds.  
A
PA INTERVAL  
PA  
2. To start the dive time measurement operation, press D.  
3. To stop the measurement, hold down D for at least  
one second (until the watch emits a long beep).  
At this time, timing of the surface interval starts. This  
timing is performed internally, and it is not indicated on  
the Dive Time Measurement Mode display. For details  
on how to view surface interval data, see “To review log  
data”.  
B
D
24  
A
C
RECALL AUTO SPL DATA  
Dive time (hours,  
minutes, seconds)  
5. After you set the time and date, press A to return to the Timekeeping Mode.  
The day of the week is automatically set in accordance with the date.  
The date can be set within the range of January 1, 1995 to December 31, 2039.  
If you do not operate any button for a few minutes while a selection is flashing, the  
flashing stops and the watch goes back to the Timekeeping Mode automatically.  
Important!  
Do not recall log data (to view the surface interval) while this procedure is in progress. If  
you do, the dive time to that point will be stored into memory and the data will be cleared  
when you re-start the dive time measurement operation.  
4. To resume timing from the dive time shown on the display, press D.  
You can repeat steps 3 and 4 as many times as you like.  
5. To clear the Dive Time Measurement Mode, stop the measurement operation (step 3,  
above) and then press A.  
About the backlight  
The backlight uses an EL (electro-luminescent) panel that causes the entire display to  
glow for easy reading in the dark. In the Timekeeping Mode or Dive Time Measurement  
Mode, press B to illuminate the display for about two seconds.  
The electro-luminescent panel loses illuminating power after very long use.  
The illumination provided by the backlight may be hard to see when viewed under  
direct sunlight.  
To review log data  
Log data can be reviewed (recalled) in the Timekeeping  
Mode.  
Surface interval  
Dive start time  
The backlight automatically turns off whenever an alarm sounds.  
1. Hold down C for at least two seconds to enter the  
Timekeeping Mode from the Dive Time Measurement  
Mode.  
2. Hold down D to display the Log Data Display. The  
Log Data Display remains visible as long as you hold  
down D. When you release D, the normal  
Timekeeping Mode display returns.  
A
INTERVAL  
PA  
B
D
24  
A
C
RECALL AUTO SPL DATA  
Dive time  
DIVE TIME MEASUREMENT MODE  
The Dive Time Measurement Mode lets you measure the  
Current time  
To clear the log data memory  
Log data in memory is automatically replaced by the  
total time you spend underwater while diving or snorkeling,  
and the amount of time spent on the surface (surface  
A
newest measurement. Use the following operation if you  
want to manually clear the log data memory.  
INTERVAL  
A
B
interval). The watch also stores one set of diving time  
PA INTERVAL  
PA  
B
D
data (total dive time and dive start time) into log memory  
for later recall.  
In the Dive Time Measurement Mode, press B to  
illuminate the display.  
24  
A
24  
A
1. While in theTimekeeping Mode, hold down D to display  
the Log Data Display.  
D
C
RECALL AUTO SPL DATA  
C
RECALL AUTO SPL DATA  
2. Press A to clear the log data memory. At this time, the  
display clears so that no data is shown.  
Precautions  
[ Cleared Display ]  
For your own safety, never operate the buttons of the  
watch while underwater or while on the water’s  
surface. Perform button operations in a safe place  
after leaving the water.  
Mode indicator  
 

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