Seiko Cal. S05A Instruction Manual

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

immediately.

● 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
battery.

WARNING

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
in water.

● TEMPERATURES

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
temperature.
Do not leave your stopwatch in very low temperatures
below -10ºC (+14ºF) for a long time since the cold may
cause:

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.

● SHOCKS

Do not subject it to violent shocks.

● MAGNETISM

Your stopwatch will not be affected by magnetism.

● CHEMICALS

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.

● PERIODIC CHECK

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
remain intact.

● 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.

● STATIC ELECTRICITY

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).

FEATURES

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.

■ STOPWATCH

The stopwatch can measure up to 99999.9 DM (999.999 minutes) in 1/10 DM(1/1000
minute) increments.
*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.

■ MEMORY FUNCTION

Up to 100 lap/split time data can be stored in memory, and they can be recalled either
during or after the measurement.

■ TIME/CALENDAR

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.

R

E

C

A

L

L

R

E

C

A

L

L

MEMORY

100

DECIMAL

S

T

A

R

E

T

/

S

T

O

P

L

A

P

/

S

P

L

I

T

R

E

S

E

T

INDUSTRIAL STOP WATCH

A

B

C

D

DISPLAY AND BUTTONS

SEIKO DIGITAL STOPWATCH FOR INDUSTRIAL MEASUREMENT Cal. S05A

CHANGE OF DISPLAYS

TIME/CALENDAR

display

STOPWATCH

<LAP TIME> display

STOPWATCH

<LAP TIME IN PROGRESS>display

ALARM display

STOPWATCH

<SPLIT TIME> display

TIMER display

Press Button D to change the display mode.

D

D

D

D

D

D

■ ALARM

• The daily alarm sounds once at the designated time (hour, minute) every 24 hours.

■ BATTERY LIFE INDICATOR

* If Buttons A, B, C and D are pressed at the same time, all the data in memory will be erased. Refer to “HOW TO RESET THE BUILT-IN IC” on page 13 for further details.

TIME/CALENDAR SETTING

B

A

C

“A” (AM)/

“P” (PM)

mark

Hour

Year

Month

D

Date

Day

Seconds

Minutes

Press to show the TIME/CALENDAR display.

▼

D

B

Press and hold for 2 seconds to show the TIME/CALENDAR SETTING display.

▼

C

A

▼

Press repeatedly to select the digits (flashing) to be adjusted.

MINUTES

HOUR

DATE(DAY)

YEAR

12-/24-HOUR INDICATION

SECONDS

▼

▼

▼

▼

▼

▼

▼

Press to set the flashing digits or reset the SECONDS to “00.”

* The DAY disappears and the SECOND digits start flashing.

* The digits move quickly if Button A is kept pressed.

● 12-/24-hour indication setting:

Change between 12- and 24-hour indications is made alternately with each press of Button A.

● Automatic shut-off function setting (ECO) :

With each press of Button A, the automatic shut-off function(ECO) is alternately set to "ON" and
"OFF."

B

▼

After all the adjustments are completed, press to return to the TIME/CALENDAR
display.

●

The DAY is automatically set once the YEAR, MONTH and DATE are set.

●

To quit the time/calendar setting, press Button B. When the stopwatch is left untouched, it automatically returns to the TIME/CALENDAR display within two
to three minutes.

●

The calendar adjusts automatically for odd and even months including February of leap years from January 1, 2006 to December 31, 2055.

●

When setting the HOUR digits in the 12-hour indication, check that “A” (AM)/“P” (PM) mark is correctly set. In the 24-hour indication, no mark is displayed.

●

If Button A and C are pressed simultaneously, all the digital segments light up. This is not a malfunction. Press any of Button A, B, C or D to return to the TIME/
CALENDAR display.

MONTH

▼

AUTOMATIC SHUT-OFF

(ECO)

* With each press of Button C in TIME/CALENDAR

display, the confirmation sound for button
operation is alternately switched "ON" and "OFF."
While the confirmation sound for button operation
is set to "ON," the mark appears on display.

Confirmation sound
for button operation

STOPWATCH

● The stopwatch can measure up to 99999.9 DM in 1/10 DM increments.

● Three separate measurement displays are available; lap time, lap time in progress and split time displays.

[LAP TIME IN PROGRESS display][LAP TIME display]

A

C

B

D

“LAP” mark Lap No.

Lap time

Accumulated

elapsed time

A

C

B

D

“RLP” mark Lap No.

Lap time

A

C

B

D

“SPL” mark Split No.

Accumulated
elapsed time

Split time

Lap time

in progress

[SPLIT TIME display]