What is the error standard of the watch

◆What is the error standard of the watch?

Due to the structural characteristics of the spring, the friction between the material and the friction between the rings and the fatigue, the output torque varies from strong to weak, and the friction generated by the spring and the gear when the force is transmitted will affect the accuracy of the time of travel. The climatic temperature, gravity, magnetic field, regional environment and location also affect the normal operation of the clockwork pendulum clock. The current quartz watch overcomes the weakness of the mechanical watch and uses the extremely stable high-frequency vibration of the quartz crystal as a reference for time. Quartz watch time deviation is generally ±0.5s (excellent product), mechanical watch travel time error is ±15s / d - ± 120s / d range is even larger, taking some famous foreign brands as an example: imported jazz watches ( Its export standard is male watch -25 ~ +29s / d, female watch -30 ~ +120s / d, 4 - 5 categories such as Pronto, Nivada, Certina (Certina ), Enicar, Sandoz, Titus, etc. The general standard requirements for workshops and distributors are less than ±45s/d for the week, and 2 to 3 tables such as plum ( Titoni), Syma, Marvin, Heuer, etc. are less than +30s/d, and high grades such as Rolex, Omega, and Longines are less than ±15s/d. Imported Japanese watches, male watches generally do not exceed ± 50s / d, female watches do not exceed ± 60s / d. The above data is for reference only. If you are used to quartz watches, please do not have to be surprised by the high error of mechanical watches, fish and bears The palm of the hand can't have both, and the mechanical complex of many people is not a quartz watch. Instead, if you are right High precision requirements, can be selected quartz watch.