Watches generally have errors, according to national regulations. The error of the mechanical meter must be within 75 seconds. If consumers encounter this situation, how can they calibrate the time of the mechanical watch themselves? Let's take a look at Watch Home with everyone below.

Mechanical meter error standard:

Men's mechanical watch: Excellent (seconds/day) -20~+30 First class (seconds/day) -30~+60 Qualified (seconds/day) -50~+90

Ladies' mechanical watch: Excellent (seconds/day) -30~+40 First class (seconds/day) -40~+80 Qualified (seconds/day) -90~+120

How to adjust the speed of a mechanical watch when it runs fast/slow

If you lengthen the balance spring, the watch will run slower. The shorter the balance spring of a watch, the higher the frequency of its back and forth oscillation, and the faster the watch will travel. If the balance spring of the watch is lengthened, the frequency of the balance wheel's swing will decrease, and the watch will move slower.

The allowable daily error of a general mechanical watch is around 30 seconds. The specific watch error depends on the movement used in the mechanical watch. If there is no clear indication of the watch error standard, the national standard shall be used as the basis. Because the error in mechanical watches is relatively large compared to quartz watches, the calibration of mechanical watches is particularly important.

Selection of time period for mechanical watch calibration:

1. If there is a situation where the calendar jumps during the day, adjustments can be made - if you find that the calendar jumps around noon during the day, it is usually because the watch's time is 12 hours faster or slower. For example, if it is actually 11 am now, but the watch was 11 pm the previous day, you only need to turn the clock one more turn, that is, change the afternoon to morning. This situation is quite common, with a probability of about 50%.

2. In order to extend the service life of watches, many watches adopt a slow jump method, which gradually jumps around midnight. Generally, jumping before 2 am is normal, and some watches finish before 4 am.

3. Please do not adjust the date between 22:00 and 2:00 (some watches have a date between 20:00 and 4:00), as it may cause damage to the watch and incorrect calendar jumps. In other words, the mechanical watch laboratory suggests that everyone try to adjust the time during the daytime.

4. The adjustment methods vary depending on the style of the watch, but when adjusting a watch with a calendar function, it is necessary to consider the morning and afternoon factors.

5. The time adjustment of general mechanical watches requires clockwise pulling. If pulled counterclockwise, it may cause the pointer of the watch to deviate. This should be particularly noted. Generally, it is worn with the left hand and adjusted with the right hand. Turning forward will turn clockwise