User manual CITIZEN WATCH B877

[. . . ] BEFORE USING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SETTING THE TIME AND DATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 USING AS A DUAL TIME WATCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 FUNCTIONS OF SOLAR POWERED WATCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Insufficient Charge Warning Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Quick Start Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Time Setting Warning Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Overcharge Prevention Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 E. CARE AND HANDLING DURING CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 F. REPLACING THE SECONDARY BATTERY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 G. TIME REQUIRED FOR CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 H. [. . . ] In case a different kind of battery such as a silver battery is used by some chance, there is a danger that it will be overcharged to burst, causing damage to the watch and even to the human body. WNotes On recharging · Avoid recharging at high temperatures (over about 60°C/140°F), otherwise the watch will be damaged during recharging. (eg) Charging the watch near a light source that easily becomes hot, such as an incandescent lamp or a halogen lamp. Charging in a place that easily becomes hot, such as a dashboard. When you charge the watch with an incandescent lamp, halogen lamp or other light source that generates heat, take a distance about 50cm (20in. ) from the light source to prevent extremely high temperature. 12 13 G. TIME REQUIRED FOR CHARGING Time required for recharging may vary according to the design (color of the dial, etc. ) and operating environment. The following table will serve you as rough reference. Illuminance (lux) 500 1000 3000 10000 100000 Time required Environment inside an ordinary office 60-70cm (24-28in. ) under a fluorescent light (30W) 20cm (8in. ) under a fluorescent light (30W) From the stop state to the one second movement * The recharging time is the time when the watch is continuously exposed to radiation. The time for fully recharge from stopped. (Empty to full) One day usage . . . . . . . . . . The time required for the watch to run for one day with one second interval movement 22 hours 11 hours 3 hours 30 minutes 1 hour 14 minutes One day usage 1 hour 30 minutes 45 minutes 15 minutes 5 minutes 2 minutes Empty to full 320 hours 158 hours 53 hours 17 hours 6 hours Exterior, cloudy Exterior, summer, sunny 14 15 H. USING THE SLIDE RULE Flying distance and other navigation calculations as well as general calculations can be performed using the slide rule located around the outside of the dial. This slide rule is not able to display decimal places for calculation results, and should only be used as a general reference as an alternative to more accurate calculations. Turning the crown at the 8:00 position allows the slide rule around the dial (Outside Scale) to be rotated. Crown for turning the outer scale Inside scale Outside scale A. Calculation of time required Question: How long does it take an airplane flying at 180 knots to fly a distance of 450 nautical miles?Solution: Set the 18 mark on the outside scale to the SPEED INDEX (Y). At this time, the point on the inside scale that is aligned with 45 on the outside scale indicates (2:30), and the answer is 2 hours and 30 minutes. 16 17 2. Speed (Ground Speed) Calculation Question: What is the speed (ground speed) of an airplane when it takes 1 hour and 20 minutes to fly a distance of 240 nautical miles?Solution: Align the 24 on the outside scale with 1:20 (80) on the inside scale. At this time, 18 is aligned with the SPEED INDEX (Y) on the inside scale, and the answer is 180 Kt. 3. Flying distance calculation Question: What is the flying distance traveled in 40 minutes at a speed of 210 knots?Solution: Align the 21 on the outside scale with the SPEED INDEX (Y) of the inside scale. The 40 of the inside scale is now pointing to 14, and the answer is 140 nautical miles. 18 19 4. [. . . ] · To clean a metal, plastic, or rubber watchband, wash away dirt with mild soap and water. Use a soft brush to remove dust and dirt jammed in the gaps in the metal band. If your watch is not water-resistant, take it to your dealer. NOTE: Avoid using solvents (thinner, benzine, etc. ), as they may mar the finish. 30 31 CAUTION: Operating environment · Use the watch within the operating-temperature range specified in the instruction manual. [. . . ]