NOTES ON THE BATTERY
●Do not remove the battery from the stopwatch.
●If it is necessary to take out the battery, keep it out of the reach of children. If a child swallows it, consult a doctor
●Never short-circuit, heat or otherwise tamper with the battery, and never expose it to fire. The battery may burst,
become very hot or catch fire.
●The battery is not rechargeable. Never attempt to recharge it, as this may cause battery leakage or damage to the
NOTES ON THE STRAP
●The stopwatch has a strap for wearing it around your neck. Take good care lest it should be caught by something
near you or wind around your neck.
●Please also note that the strap may damage your clothes, or injure your hands, neck or other parts of your body.
You are now the proud owner of a SEIKO Digital Stopwatch Cal. S05A. For best results, please read the instructions in
this booklet carefully before using your SEIKO Digital Stopwatch. Please keep this manual handy for ready reference.
TO PRESERVE THE QUALITY OF YOUR STOPWATCH
●WATER RESISTANCE (5 bar)
Your stopwatch is designed and manufactured to
withstand up to 5 bar, such as accidental contact with
splashes of water or rain.
Do not operate the buttons when the stopwatch is wet or
If the stopwatch is left in direct sunlight for a long time,
the display may become black, but this condition will be
corrected when the stopwatch returns to normal
Do not leave your stopwatch in very low temperatures
below -10ºC (+14ºF) for a long time since the cold may
a. a slight time loss or gain.
b. the change of digits to become slow.
c. the display light to dim.
However, the above conditions will be corrected when
the stopwatch returns to normal temperature.
Do not subject it to violent shocks.
Your stopwatch will not be affected by magnetism.
Be careful not to expose the stopwatch to solvents,
mercury, cosmetic spray, detergents, adhesives or paints.
Otherwise, the case, etc. may become discolored,
deteriorated or damaged.
It is recommended that the stopwatch be checked once
every 2 to 3 years. Have your stopwatch checked by an
AUTHORIZED SEIKO DEALER or SERVICE CENTER to
ensure that the case, buttons, gasket and crystal seal
●PRECAUTION REGARDING CASE BACK PROTECTIVE FILM
If your stopwatch has a protective film and/or a sticker on
the case back, be sure to peel them off before using it.
The IC (Integrated Circuit) used in your stopwatch will be
affected by static electricity which may disturb the display.
Keep your stopwatch away from close contact with objects
such as TV screens which emit strong static electricity.
●LIQUID CRYSTAL PANEL
The normal life expectancy for a liquid crystal panel is
approximately 7 years. After that it may decrease in
contrast, becoming difficult to read. Please contact your
AUTHORIZED SEIKO DEALER or SERVICE CENTER if you
wish to have a new panel fitted (guaranteed one year).
The SEIKO Quartz Stopwatch for industrial measurement Cal. S05A is a digital decimal stopwatch that can be used for activities such as production
control and performance analysis. The stopwatch features a lap time/split time memory function that can store and recall up to 100 sets of lap
times and split times. Time/calendar, timer, and alarm functions are also provided.
The stopwatch can measure up to 99999.9 DM (999.999 minutes) in 1/10 DM(1/1000
*DM (Decimal): Unit used in a decimal system
1 DM=1/100 minute
100 DM = 1 minute
600 DM = 6 minutes
6000 DM = 60 minutes
■LAP TIME, LAP TIME IN PROGRESS AND SPLIT TIME DISPLAYS
Three separate stopwatch displays are available for lap time, lap time in progress and
split time measurements.
Up to 100 lap/split time data can be stored in memory, and they can be recalled either
during or after the measurement.
Year, month, day, date, hour, minutes and seconds are displayed.
The calendar automatically adjusts for odd and even months including February of leap
years from January 1, 2006 to December 31, 2055.
■AUTOMATIC SHUT-OFF FUNCTION
When the stopwatch is left untouched for one hour, the display automatically becomes
blank in order to minimize battery consumption.
■DOUBLE REPEAT TIMER
•The built-in two descending timers (which allow you to set two different timer times)
can be used repeatedly one after the other.
•Each Timer 1 and Timer 2 can be set for any desired amount of time from 10 seconds
up to 99 hours, 59 minutes and 59 seconds in one-second increments.
•For easy distinction between Timer 1 and Timer 2, the time-up warning beeps are
different in tones.
INDUSTRIAL STOP WATCH
DISPLAY AND BUTTONS
SEIKO DIGITAL STOPWATCH FOR INDUSTRIAL MEASUREMENT Cal. S05A