Seiko SSG022 Owner Manual - Page 17
Caution
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English TELEMETER (for models with telemeter scale on the dial) l The telemeter can provide a rough indication of the distance to the source of light and sound. l The telemeter indicates the distance from your location to an object that emits both light and sound. For example, it can indicate the distance to the place where lightning struck by measuring the time elapsed after you see a flash of lightning until you hear the sound. l A flash of lightning reaches you almost immediately while the sound travels to you at a speed of 0.33 km/second. The distance to the source of the light and sound can be calculated on the basis of this difference. l The telemeter scale is graduated so that the sound travels at a speed of 1 km in 3 seconds.* *Under the condition of temperature of 20° C(68° F) CAUTION The telemeter provides only a rough indication of the distance to the place where lightning struck, and therefore, the indication cannot be used as the guideline to avoid the danger of lightning. It should also be noted that the speed of the sound differs depending on the temperature of the atmosphere where it travels. 32 #@&@@JOEE English HOW TO USE THE TELEMETER Before beginning, check that the stopwatch has been reset. START (Flash of light) C 1 Press Button C to start the stopwatch as soon as you see light. STOP (Crash of thunder) C 2 When you hear the sound, press Button C to stop the stopwatch. 3 Read the telemeter scale that the STOPWATCH 1/5second hand points to. Approx. 3 km Please note that the STOPWATCH 1/5-second hand moves in 1/5-second increments and does not always point exactly to the graduations of the telemeter scale. The telemeter scale can be used only when the measured time is less than 60 seconds. 33