Seiko S351 - Changeover Between 12- and 24-Hour Indications; How to Use the Time Calculation Mode; Entry of Times

Notes:
・The time can be entered either by using the number entry and time keys or by using
the number entry keys alone according to the time you wish to set. (For details, see
“Entry of times” in “■ HOW TO USE THE TIME CALCULATION MODE”.)
・If a wrong number has been entered, press the clear/clear entry key and enter the
correct one.
・The hour should be entered in the 24-hour indication. (If it is 2:00 p.m., for example,
enter “14” instead of “2”.)
・Any digits left unentered will be regarded as “0”. (See “■ HOW TO USE THE TIME
CALCULATION MODE”.)
4
B
Press button in accordance with a time signal. The display will return to the TIME
and the seconds will start immediately from the set time.
Notes:
・If the entered time exceeds “23:59 59”, the display will return to the time setting
display.
・If digits greater than “60” are entered for the minutes or seconds and button is
pressed, one hour or minute will be added, respectively.
・If the watch is set to show the time in the 12-hour indication, the set time will be display-
ed in the 12-hour indication, though it should be entered in the 24-hour indication.
・When the time is not newly set and button  is pressed, the display will show the
time set previously.
B
B
→
(Time set previously)
Second setting (Second setting can be made easily if the time displayed is less
than 30 seconds ahead of or behind the correct time.)
・Follow the procedure below to reset the second digits to “00”.
In the time mode, press button to show the second
setting display.
→
Press button in accordance with a time signal.
The second digits are reset to “00”.
Notes:
･ When the second digits read any number from “30”to
“59” and button is pressed, one minute is added and
the seconds are reset to “00”.
･ If the time is more than 30 seconds ahead of or behind
the correct time, show the time setting display to set the
correct time.
･ When button is pressed, the watch will return to the
time mode.
A
B
B
1
2
B
A
B
B
B
Changeover between 12-and 24-hour indications
・As the 24-hour indication system is commonly used in the broadcasting
stations, the watch is so designed that the time should be entered only in
the 24-hour indication.
・It is also possible, however, to show the time in the 12-hour indication.
In the time mode, press button three times to show the display for
changeover between 12-and 24-hour indications.
With each press of button , the display changes over between the 12-
and 24-hour indications alternately.
〈24-hour indication〉 〈12-hour indication〉
Notes:
・Once the desired time indication has been selected in the time mode, the
current time will be displayed in the selected indication in all modes.
・When the 12-hour indication is selected, there is no mark displayed to
distinguish between “AM” and “PM”.
A
B
1
2
B
■HOW TO USE THE TIME CALCULATION MODE 「CALC.」
・The addition and subtraction of times can be made simply by
entering the hour, minute and second digits.
・Up to ±99 hours 59 minutes and 59 seconds can be entered
for calculation.
・The time can be entered either by using the number entry and
time keys or by using the number entry keys only.
・The calculation result can be stored and recalled for use in the
timer and stopwatch modes as the starting time.
Entry of times
To enter the time digits, use the number entry and time keys
as described below.
●Follow either of the two methods below.
〈Entry with the number entry keys only〉
・Use the number entry keys from [0] to [9] to enter the desired
time.
・This method is useful for entering time with a few digits.
〈Entry with the number entry and time keys〉
・Use the time keys ([時 (HOUR)], [分 (MINUTE)] and [秒
(SECOND)]) together with the number entry keys to enter
the desired time.
・This method is useful for entering time having blank digits,
for instance, “2 hours”.
Notes:
・Before entering time, press the clear
/clear entry key to reset the digits to “0”.
・The two methods above cannot be
used in combination to enter the time.
See the following cases as examples.
〈Case 1〉To enter “2 hours and 15
minutes”: Once you have
entered [2] and [時 (HOUR)]
for the hour digits, you should
not enter [1], [5], [0] and [0]
but should enter [1], [5] and
[分 (MINUTE)].
〈Case 2〉To enter “2 hours and 15
minutes”: Once you have
entered [2], [1], [5], you
should not enter [分
(MINUTE)] but should enter
[0] and [0].
・To set the starting time in the timer and
stopwatch modes, also use either of the
two methods above.
分時 秒
Notes:
・If a wrong number has been entered, press the
clear/clear entry key and enter the correct one.
・If a number greater than 60 is entered for the
minute or second digits, one hour or minute is
added when [＋], [−] or [＝] is entered. (In this
case,“
″
” mark will be displayed.)
・When a calculation result exceeds 99 hours 59
minutes and 59 seconds, the error mark “Error”
is displayed, To clear the error mark, press the
clear/clear entry key. The digits are reset to “0”.
・Enter from the upper digits in order.
・Start entering from the digits having
numbers. It is not necessary to
enter [0] and [0] for the hour digits.
・Enter [0] for the blank digits.
●Detailed explanation of entry methods
Turn the mode selector to set the knob to “CALC.”.
Entry with the number entry keys only
・Use the number entry keys to enter numbers in the order of hour,
minute and second digits, entering [0] for the blank digits.
Ex. 1) 2 hours 15 minutes 10
seconds
[2] [1] [5] [1] [0]
Ex. 2) 15 minutes 2 seconds
[1] [5] [0] [2]
Ex. 3) 10 hours 8 seconds
[1] [0] [0] [0] [0] [8]
1
［C/CE］
→