The travel time for the clock error , the existing line of standard provides that:
Calendar mechanical watch I ( male form) the instant when the error range of walk : excellent product every 24 hours error -30 ~ +45 seconds ; Grade 24 errors per second -40 ~ +75 ; qualified product every 24 hours error -60 ~ +105 Seconds . Extended travel time are greater than or equal to 36 hours .
Calendar mechanical watch II ( medium-sized watch ) the instant when the error range of walk : excellent product every 24 hours error -35 ~ +65 seconds ; Grade 24 errors per second -50 ~ +95 ; Qualified instantaneous error of travel time for each 24 Hour error -70 ~ +135 seconds . Extended travel time was more than equal to 35 hours .
Calendar Type III mechanical watches ( Kun watch ) the instant when the error range of walk : excellent product every 24 hours error -40 ~ +85 seconds ; Grade error -60 ~ 24 hours per +115 seconds ; Qualified error every 24 hours ~ +165 -80 Seconds . Extended travel time was more than equal to 34 hours .
Automatic mechanical watch I ( male watch) the instant when the error range of walk : excellent product every 24 hours error -20 ~ +30 seconds ; Grade error -30 every 24 hours ~ +60 seconds ; Qualified error every 24 hours ~ +90 -50 Seconds . Extended travel time are greater than or equal to 36 hours .
Automatic mechanical watch II ( medium-sized watch ) the instant when the error range of walk : excellent product every 24 hours error -25 ~ +50 seconds ; Grade error -40 every 24 hours to +80 seconds ; qualified product every 24 hours error -60 ~ +120 Seconds . Extended travel time are greater than or equal to 30 hours .
Automatic mechanical watch -III ( Kun watch ) the instant when the error range of walk : excellent product every 24 hours error -30 ~ +70 seconds ; Grade each error -50 ~ +100 24 seconds ; Qualified error every 24 hours ~ +150 -70 Seconds . Extended travel time was more than equal to 28 hours .
Quartz watch , regardless of type , the instant when the error range of walk : excellent product every 24 hours error -0.5 ~ +0.5 seconds ; Grade error of -1.0 per 24 hours ~ 1.0 seconds ; qualified product every 24 hours Error of -1.5 ~ 1.5 seconds .
From the above criteria , we can see , quartz watches as the electronic Kongzhi , so Zou O'clock high degree of accuracy , Er mechanical principle of the watch as Kao mechanical swing when walking , so Ta of travel time accuracy Xiangdui to badly . In addition, the greater the mechanical watch , the more accurate travel time , whereas the smaller is the lower accuracy .
Automatic mechanical watch travel time caused by inaccurate for two main reasons , first, the quality of the watch itself , such as automatic winding failure , and so can cause failure pendulum walking allowed ; Second, consumer issues. The former can be detected by the relevant state department testing concluded that if the quality problems , businesses have the required withdrawal , exchange , maintenance . The latter depends on the specific circumstances of consumers , such as what kind of person to wear , what to wear , etc. environment .
Is the cause of consumers , including the following:
Lack of user activity , resulting in automatic watch winding discontent , leading to slow or stop watch to go away . Office of the elderly and sedentary , low physical activity are not sui watch for wearing such a watch .
Watch close to magnetic fields , such as televisions, mobile phones , resulting in travel time are not allowed to watch .
Wear themselves with a strong magnetic field the human body and affect travel time watch .
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