Seiko 8R28 Manual - Page 12

Problem Possible causes Solutions English The watch has been left Normal accuracy will resume in extremely high or low when the watch returns to normal temperatures for a long time. temperature. The watch gains/loses time temporarily. The watch was brought into close contact with a magnetic object. You dropped the watch, hit it against a hard surface or wore it while playing active sports. The watch was exposed to strong vibrations. Normal accuracy will resume when the watch is kept away from close contact with the magnetic source. If this condition persists, consult the retailer from whom the watch was purchased. Normal accuracy will not resume. Consult the retailer from whom the watch was purchased. The watch has not been overhauled for more than 3 years. Consult the retailer from whom the watch was purchased. The glass is blurred and Water got inside the watch Consult the retailer from whom the the blur persists for a due to the deterioration of watch was purchased. long time. the gasket, etc. The stopwatch minute hand and stopwatch hour hand move while you are setting the watch to the current time. Time setting is done while the stopwatch is operating. Push the crown back in to the normal position. And then, stop and reset the stopwatch. After that, if you wish to set the time, follow the procedures in "HOW TO SET THE TIME AND DATE" section of this booklet. • For the solution of troubles other than listed above, contact the retailer from whom the watch was purchased. 22 ACCURACY OF MECHANICAL WATCHES ● The accuracy of mechanical watches is indicated by the daily rates of one week or so. ● The accuracy of mechanical watches may not fall within the specified range of time accuracy because of loss/gain changes due to the conditions of use, such as the length of time during which the watch is worn on the wrist, arm movement, whether the mainspring is wound up fully or not, etc. ● The key components in mechanical watches are made of metals which expand or contract depending on temperatures due to metal properties. This exerts an effect on the accuracy of the watches. Mechanical watches tend to lose time at high temperatures while they tend to gain time at low temperatures. ● In order to improve accuracy, it is important to regularly supply energy to the balance that controls the speed of the gears. The driving force of the mainspring that powers mechanical watches varies between when it is fully wound and immediately before it is unwound. As the mainspring unwinds, the force weakens. Relatively steady accuracy can be obtained by wearing the watch on the wrist frequently for the self-winding type and winding up the mainspring fully everyday at a fixed time to move it regularly for the wind-up mechanical type. ● When affected by strong external magnetism, a mechanical watch may loss/gain time temporarily. The parts of the watch may become magnetized depending on the extent of the effect. In such a case, consult the retailer from whom the watch was purchased since the watch requires repair, including demagnetizing. 23 English