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The stroke/frequency of an activity per minute is automatically calculated by measuring the time required to make three strokes.
Measurable number of strokes per minute is between 10 and 180.
Up to 9 data can be stored in memory.
STROKE/FREQUENCY MEASUREMENT
Start of
measurement
Measuring
Stop of
measurement
1. Press “D” to show the STROKE/FREQUENCY MEASURING display.
2. Press “A” to start the measurement.
3. Press “A” to stop the measurement after the third stroke was made.
D
Reset
A
A
Notes:
1. During the first second after the measurement has been started by pressing “A”, flashing “180-0” is
displayed. If the measurement is stopped by pressing “A” during the period, “Error” will appear. If the
measurement is not stopped by pressing “A” after more than 18 seconds have elapsed, “Error” will
automatically appear.
2. If “B” is pressed while the measurement is stopped or “Error” is shown, the digits will be reset to “0-0”.
Even if the digits are not reset to “0-0” with the measurement stopped or “Error” shown on the display, the
measurement can be started by pressing “A.”
3. When the digits are reset to “0-0” or a new measurement is started, the data measured last will be stored
in Memory-1. When the new measurement is made, it will be stored in Memory 1 as the data in Memory-
1 is transferred to Memory-2.
4. When more than 9 measurements are made, the oldest data will be erased from memory.
Number of strokes
per minute
Memory No.
“Error” mark
1. HOW TO USE THE STROKE/FREQUENCY MEASURING FUNCTION
With each press of “C”, the data is recalled starting from Memory-1.
* The data cannot be recalled while the measurement is being made.
2. RECALL OF THE STORED DATA
3. HOW TO CLEAR THE STORED DATA
Once the following steps are taken, all the stored data are erased from memory. The stored
data cannot be erased one by one.
1. Press “C” to show the MEMORY RECALL display.
2. Keep “B” pressed for more than 1.5 seconds.
* While the button is kept pressed, the display shown at right appears with warning beeps.
* After 1.5 seconds, all the stored data is erased from memory with a long beep. Then, the initial measurement
display is shown.
* Unless “B” is kept pressed for more than 1.5 seconds, the stored data will not be erased from memory.
B
C
BATTERY CHANGE
The lithium battery which powers your watch should last approximately 3 years. However, because the battery is inserted at the factory to check the function and
performance of the watch, its actual life once in your possession may be less than the specified period. When the battery expires, be sure to replace it as soon as possible
to prevent any malfunction. For battery replacement, we recommend that you contact an AUTHORIZED SEIKO DEALER and request SEIKO SB-T74 battery.
* If the stopwatch is used for more than 3 hours a day, the battery life may be less than the specified period.
Battery life indicator
* When the battery is replaced with a new one, all the stored data will be erased from memory.
When the battery nears its end, a flashing battery mark “BATT” is displayed. In that case, have the battery replaced with a new one as soon as possible by the retailer
from whom the stopwatch was purchased or an AUTHORIZED SEIKO DEALER.
SPECIFICATIONS
1. Frequency of crystal oscillator .............. 32,768 Hz (Hz = Hertz … Cycles per second)
2. Accuracy ................................................. 0.0006% at normal temperature range (5 ºC - 35ºC) (41ºF - 95ºF)
Less than 15 seconds per month
3. Operational temperature range ............ –10ºC - +60ºC (14ºF - 140ºF)
4. Desirable temperature range of use ..... 0ºC - +50ºC (32ºF - 122ºF)
5. Display system
Time/calendar display ..................... Hour (24-hour indication), minute, second, year (from 2006 to 2055), month, date, ID No. (OFF / 01 - 99)
CONTRAST ADJUSTMENT (1 -10)
Stopwatch display ........................... Hour, minute, second, 1/100 second
Three-row display of split time, lap time, total elapsed time or lap time in progress
Number of blocks (1 - 999), Number of lap/split times (0 - 999), Memory capacity indicator (bar indicator)
Stroke/frequency
measuring display ........................... Number of strokes (10 - 180 per minute, measurement time 1 to 18 seconds), Number of measurement (1- 9)
6. Display medium ..................................... Nematic Liquid Crystal, FEM (Field Effect Mode)
7. Battery ..................................................... Lithium battery SB-T74, 1 piece
8. Battery life............................................... Approximately 3 years (If the stopwatch is used for more than 3 hours a day, the battery life may be less than the specified period.)
9. IC (Integrated Circuit) ............................. C-MOS-LSI, 1 piece
10. Battery life indicator is available.
* The specifications are subject to change without prior notice, for product improvements.