Seiko V157 Specifications download pdf (Page 12)

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LUMIBRITE

LumiBrite is a luminous paint that is completely harmless to human beings and the natural

environment, containing no noxious materials such as radioactive substances.

LumiBrite is a newly-developed luminous paint that absorbs the light energy of sunlight or

artiﬁcial light in a short time and stores it to emit light in the dark.

For example, if exposed to a light of more than 500 lux for approximately 10 minutes,

LumiBrite can emit light for 5 to 8 hours.

Please note, however, that, as LumiBrite emits the light it stores, the luminance level of the

light decreases gradually over time. The duration of the emitted light may also differ slightly

depending on such factors as the brightness of the place where the watch is exposed to light

and the distance from the light source to the watch.

When you make a dive in dark water, LumiBrite may not emit light unless it has absorbed and

stored light sufﬁciently.

Before diving, therefore, be sure to expose the watch to light under the conditions speciﬁed

above, so that it fully absorbs and stores light energy. Otherwise, use the watch together with

an underwater ﬂashlight.

< Reference data on luminance >

(A) Sunlight

[Fine weather]: 100,000 lux [Cloudy weather]: 10,000 lux

(B) Indoor (Window side during daytime)

[Fine weather]: more than 3,000 lux [Cloudy weather]: 1,000 to 3,000 lux

[Rainy weather]: less than 1,000 lux

(C) Lightingapparatus(40-wattdaylightuorescentlight)

 [Distancetothewatch:1m]:1,000lux

 [Distancetothewatch:3m]:500lux(averageroomluminance)

 [Distancetothewatch:4m]:250lux

* "LUMIBRITE" is a trademark of SEIKO HOLDINGS CORPORATION.

SPECIFICATIONS

1 Frequency of crystal oscillator ..............  32,768Hz(Hz=Hertz…Cyclespersecond)

2 Loss/gain(monthlyrate) ........................ ±15 seconds at normal temperature range

(5°Cto35°C/41°Fto95°F)

3 Operational temperature range .............  –10°Cto+60°C(14°Fto140°F)

4 Driving system ....................................... Step motor

5 Power supply .........................................  Manganesetitanium-lithiumrechargeablebattery

6 Additional function .................................  Instant-startfunction,energydepletionforewarn-

ing function and overcharging prevention function

7 IC(IntegratedCircuit) ............................  C-MOS-IC,1piece

* The speciﬁcations are subject to change without prior notice for product

improvement.

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Seiko V157 Specifications Page 12