What is the error standard of Tianjun watch in Nanning, Guangxi?

The daily error of ordinary quartz watches is less than 0.5 seconds, which is one tenth of that of mechanical watches. This is mainly due to the high and stable oscillation frequency of the time oscillator in quartz watch. The principle of high-frequency timing accuracy is a principle discovered by people in the process of long-term research on how to improve the timing accuracy of watches. The higher the oscillator frequency, the more stable the oscillation, the stronger the anti-interference ability, and the more accurate the watch will be. The oscillation frequency of quartz electronic watch is 32768Hz, which is 1000 times higher than the oscillation frequency of 3Hz per second of ordinary fast pendulum mechanical watch. Therefore, quartz electronic watches are much more accurate than mechanical watches. In addition, due to the structural problems of mechanical watches, due to the gravity of the earth, the deviation between horizontal position and vertical position will produce potential difference, and the torque of spring from winding to loosening will be unbalanced. In addition, due to the influence of external temperature, magnetic field and vibration, even if the frequency of mechanical watches is increased, it is impossible to achieve the accuracy of quartz electronic watches.

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As an ordinary consumer, the most important thing to wear a watch is its accuracy. Some people are even so demanding that the error of a few seconds a day is not satisfied (mechanical watch). As we know, the current industry standard of watches stipulates that the error of mechanical watches is usually within +/-30 seconds/day, and that of quartz watches is within +/-0.5 seconds/day. The error standard should be calculated by the day, and the error of actually wearing the watch will of course accumulate.

The travel time accuracy of mechanical watches can be said to change all the time, and the biggest factor affecting the accuracy of mechanical watches is the swing of the balance wheel. Swing amplitude is mainly affected by the magnitude of spring moment (tightness of string) and position change. Under different swing amplitude, the watch has different instantaneous daily difference, which means that its accuracy always changes dynamically. The accuracy of quartz watch is mainly affected by temperature. At 25 degrees Celsius, the accuracy is the most accurate. No matter whether the temperature increases or decreases, the result will slow down the watch.

The error of mechanical watch mainly comes from synchronization error and position error. In fact, the error has a great relationship with the swing of the balance wheel. I have also met some very careful people who have observed and experimented with their watches and recorded the daily travel time error. Some people have high demands on the accuracy of mechanical watches. In fact, the one-day error of a watch 10 second is quite accurate, but others think it is not accurate enough.

The travel time accuracy of mechanical watches cannot be achieved or maintained by correction.

Why do you say that? That's because the time of a mechanical watch is constantly changing. It can be temporarily accurate at a fixed position and a temperature, but it will change when compared with another condition, and it will be different immediately. In other words, even if the watch is calibrated for one second, you will find that it will not last long, and the accuracy always changes and fluctuates in an instant. In addition, there are many other factors that affect the accuracy of watches. The watch error we see can only be true, the average error per unit time.

Watches have the best time accuracy when the wind is full.

If you want to keep your watch accurate, you must wind it as fully as possible, which is more important for automatic watches. Because the tightness of the spring of an automatic watch is directly related to the time you wear and the amount of exercise you wear, provided that you ensure enough exercise.

Watches have different travel time accuracy in different positions.

This is what we call watch position error. A good watch must be tested in three temperatures and five directions when it leaves the factory. The five positions are: up (dial up), down, down (3 o'clock), down left (12 o'clock), up (9 o'clock) and only down right (6 o'clock), which is not commonly used (unless according to statistics, most people spend about 35% of their time on the surface of their hands, 30% of them). Therefore, when the watch walks in different positions, it can use different precision errors to correct its speed trend.

Do an observation test first, and then record it

The test method is simple. You need to wind the watch first, then use a standard time to align the hours, minutes and seconds of the watch to synchronize it, then put it in a flat position for 24 hours, and then compare the errors with the standard time and record them. Repeat the above process in turn, test the actual travel time errors of the lower surface, lower handle, left handle and upper handle of the watch respectively, and record them.

For example, the static test results are: surface +20 seconds/day, subsurface +20 seconds/day, handle -5 seconds/day, left side +25 seconds/day, handle+10 seconds/day. Results The actual time error of the watch is+15 seconds/day.

Take off your watch at night and choose the orientation of the watch to correct the error.

In the case of the above example, it is obvious that the watch handle should be put down at night to help reduce the accumulated error when the watch is running. Only when we have an accurate understanding of the causes and characteristics of the errors in our watches can we serve ourselves better.

When we wear a watch, we can only feel its actual error, but this error is actually an average and comprehensive error value. People who know watches don't care too much about accuracy or error, because accuracy is not the only criterion for a good watch. In fact, the long-term stability of watches is the most important thing. Some watches may run well within half a year after being bought and put on, but the error will increase after half a year. This is instability, and watches like Rolex (10 discount, minimum 4 1800 yuan) will not have this problem.

For example: "There are three hand watches, A, B and C, and the travel time error of A is (-20 seconds, 0 seconds, +20 seconds) in 3 days, and the cumulative error in 3 days is 0 seconds; In Table B, the errors in three days are (+20s, +5s,+10s) respectively, and the cumulative error in three days is+35s; In Table C, the errors in three days are (+20, +25 and +20) respectively, and the cumulative error in three days is +65 seconds. Comments: Table C is the best, Table B is the second, and Table A is the worst! " Because only watches that are stable for a long time are accurate watches.

A watch with good running stability also shows that it has strong anti-interference ability, high reliability and good performance indexes related to the quality of the watch. If you are careful or interested, you can also track your watch and record whether its time accuracy is stable.

Common sense of daily wear of mechanical watches:

The power source of automatic mechanical watch is the swing of the wearer's wrist, which generates energy to wind the spring. A automatic mechanical watch can run for about 36 hours (Swiss movement); It can run for about 15 hours if it is worn normally every day. If you don't wear it for more than the above time or shake it enough (the wearer doesn't exercise much), the watch will stop. Before wearing it again, fully wind it, and the energy storage time of the movement will vary according to different movements.

This paper first introduces what automatic mechanical watch is, and it can be operated by the automatic winding mechanism that can wind up the spring by rotating the automatic dial lever in any direction (visible in the transparent watch). It is conceivable that only the watch is worn on the hand, and with the movement of the arm, the automatic lever also rotates to generate energy. Generally, an automatic watch should be worn on your hand for more than 8 hours every day to make up the energy of the clockwork, but it is not absolute. It is recommended to wear watches on holidays. Only by wearing it on your hand and constantly replenishing energy for the clockwork will the watch not stop. At present, it is very common for people who work in an office that their watches often stop running. Besides exercise, this is because their wearers don't have enough exercise and can't replenish enough energy for the clock mechanism. If so, the clockwork can be mended manually.

1) Watches generally have certain shockproof function, and the shockproof function inside the watch can play a role under the impact of external forces. If the positive and negative poles of the quartz watch battery are disconnected, and the pendulum wheel of the mechanical watch is misplaced, it will cause the watch to stop running and give you the illusion that the watch is broken. Actually, just go to the authorized repair station and reinstall it.

2) The so-called antimagnetic watch, not all the parts in the watch are antimagnetic, only the main parts, such as balance wheel, hairspring and clockwork, are antimagnetic materials.

3) Although some watches have anti-shock and anti-magnetic functions, they can only play a preventive role, so it is necessary to avoid violent collision or put the watches next to electrical appliances or magnetic objects that generate magnetic fields, such as televisions, stereos, freezers, mobile phones, induction cookers, electric mahjong tables and magnetic bags. The above reasons will cause the watch to stop or be inaccurate.

Matters needing attention

1.) Do not adjust the calendar, day of the week and moon phase of the watch between 21:00pm and 3: 00am. During this period, the calendar function is in operation. At the same time, when the gear meshing degree is low, frequent actions will damage the internal parts of the watch, and the adjustment of the calendar needs to be made within 12 hours (24 hours

2) One-week calendar jump can be divided into fast and slow due to different formats. The first calendar skipping is completed in 5 minutes, and the second calendar skipping is completed in 3 hours.

3) If it is a watch with a spiral crown, don't pull it hard. First, turn counterclockwise to open the locked crown. After adjusting the time, turn it clockwise and push it into the lock to avoid water.

4) If the date of a watch with a calendar needs to be adjusted, please adjust the calendar to the day before the required date, and then turn the clockwise to adjust the date. At that time, when the pointer passes 12 midnight, the date will change to avoid confusion between day and night caused by direct adjustment of the date.

5) If the watch has complicated functions, please read the attached instructions carefully first.

Mechanical watches generally have a running-in period, usually two months, that is to say, it is best to wear them normally for two months first, and then adjust them if necessary after understanding the deviation of the watches.

First of all, we should use an accurate clock as a reference time, such as the clock time of subway station or the time of TV station, which is more accurate and can be used as a reference. In addition, it should be noted that mechanical watches generally have a running-in period, usually two months, which means it is best to wear them normally for two months first, and then adjust them if necessary after understanding the deviation of the watches.