What is the mechanical stop meter to measure, how to look at the mechanical stop watch

The mechanical stop is powered by a low-frequency balance balance oscillation system through a mainspring and anchor escapement, a gear system drives the hands to display minutes and seconds, and a special start-stop mechanism is provided. Generally, the minimum division of the dial of the stop watch is or, and the measurement range is 0 15min or 0 30min. Some stops also have a pause button, which can be used to accumulate timers.

Errors in timing measurements using a stop watch should be considered in two cases.

1) Short-term measurement (within tens of seconds), the error is mainly the operation error of starting, braking and stopping. The value is about, and sometimes greater.

2) Long-term measurement, in addition to the operation error of the meter, there is also the instrument error of stopping the meter. Before the experiment, the stop watch can be calibrated with high-precision timing instruments, such as digital milliseconds meters.

Due to the delicate machinery and fragile structure of the stop watch, it requires great care when using it to maintain its accuracy and prolong its service life.

The accuracy of the mechanical stop watch is down to the second.

The structure of a mechanical stop watch is the same as that of a regular mechanical watch.

The core component of a mechanical watch is different from that of a quartz watch, which is the mechanism that determines the length of a second. Mechanical watches are springs, driven by a mainspring, that is, they need to be wound. The spring is more affected by the outside world, and because of the influence of the spring, it is easy and fast to finish the winding, of course, the world's famous brand watches are better handled.

The general quartz watch its timing mechanism is a crystal oscillator, the use of its vibration cycle is very regular to time, this vibration is rarely affected by the external environment, and does not need to be wound, as long as there is an electric energy supply, so the quartz watch is accurate.

The most accurate is now the atomic clock, which is similar in principle to a quartz watch, and also uses the natural periodic time of atoms, but with the highest accuracy.

The view of the mechanical stop watch is as follows:

1. The mechanical stop watch is composed of two bezels, the large bezel has 30 grids, each grid represents 1s, and 30s after one turn; The small bezel has 15 grids, each grid represents 1min. The small bezel goes 1 square, and the large wheel bezel turns 2 times.

2. When reading, first look at the subdial to determine the number of minutes, and add the seconds of the large dial, for example, the time has passed 2min6s. Let's take a look at the time reading.

3. The subdial represents the time that has passed 2min30s, and the large dial is 6s, adding up to 2min36s. Therefore, when the mechanical stop watch is reading, first look at the subdial, then look at the large dial, and add it up. Sometimes we come across such a dial.

4. We can regard the large dial scale as two circles of scales, when the subdial pointer is in front of the center line, use 2min to increase the small scale of the dial orange plate for 6 s, which is 2min6s; When the subdial hand is behind the center line, use 2min to increase the dial scale by 36s, which is 2min36s.

Hello, glad to answer for you. The method of stopping the watch is as follows: 1. Press the timing button if there is a timing button; 2. Second, some watches have a stop second function in order to adjust the correctness of the time, that is, when you pull out the watch handle to adjust the spine to close the whole time between the dates, the second hand grip is stopped and does not move. I guess you're asking about the second scenario.

Summary. When the wearer does not swing his arm, or simply does not wear this mechanical watch, then the kinetic energy of the mechanical watch is not replenished, and the watch will stop. In this case, don't worry, put the watch on your hand, and then quickly swing your arm a few times, the front and back angle is about 100 °, in the process of swinging, the swing device inside the mechanical watch will wind the watch, and the watch will move normally if it has kinetic energy.

2. In addition to the mechanical watch that relies on swing winding, there is also a kind of watch that relies on knobs and winding keys to complete charging, and a charging can support the watch to move normally for about 30 50 hours. This means that as long as the wearer does not wind the mechanical watch, the mechanical watch will stop moving immediately after 30 to 50 hours of rotation. If you want to keep the mechanical watch moving, you have to turn the dial or use the winding key to rewind the mechanical watch, and it can be restored after winding.

3. There is a "bowstring" in a bowstring mechanical watch, when the wearer winds the watch, the bowstring will be tightened, and then the kinetic energy will be stored, and this kinetic energy will support the watch to continue to move.

When the wearer does not swing his arm, or simply does not wear this mechanical watch, then the kinetic energy of the mechanical watch is not replenished, and the watch will stop. In this case, don't worry, wear the watch on your hand, and then quickly swing your arm a few times, the angle between the front and back is about 100 °, in the process of swinging, the swing device inside the mechanical watch will wind the watch into the potato line, and the watch will move normally if it has kinetic energy. 2. In addition to the mechanical watch that relies on swing winding, there is also a kind of watch that relies on knobs and winding keys to complete charging, and a charging can support the watch to move normally for about 30 50 hours.

This means that as long as the wearer does not wind the mechanical watch, the mechanical watch will stop moving immediately after 30 to 50 hours of rotation. If you want to keep the mechanical watch moving, you have to turn the dial or use the winding key to rewind the mechanical watch, and it can be restored after winding. 3. There is a "bowstring" in a bowstring mechanical watch, when the wearer winds the watch, the bowstring will be tightened, and then the kinetic energy will be stored, and this kinetic energy will support the watch to continue to move.

Hold the watch and continue to walk and beat. And this bowstring is made of alloy, its toughness and elasticity are very good, and the slag will not be damaged easily, but there are exceptions to everything. If this bowstring is damaged, then the watch cannot store kinetic energy and the watch cannot move.

In this case, you can only go to the official pants of the watch to lift the envy side of the after-sales station to disassemble and inspect and repair.

When it comes to mechanical stops, some people may feel unfamiliar, but those who have been in the laboratory for a long time must be familiar with mechanical stops. As a timekeeping tool, mechanical stop watches are also used in some work, so it is quite meaningful to understand the role of mechanical stop watches. So how do you look at the mechanical stop watch?

How to distinguish the timing of the large and small discs, these are all questions, if you are still wondering, read the following content sorted out, may be able to help you.

The first choice is to carry out a basic science popularization of mechanical stop watches:

What is a mechanical listening table? In fact, it is a tool that everyone often uses as a timekeeping tool in the laboratory. The indexing value of this mechanical stop can be reached, and when the mechanical stop watch is reading, the minutes and seconds are read respectively, where the minutes are small plates

The time for a lap is 15 minutes or 60 minutes, and of course there are 30 minutes; Seconds are**: The time for each revolution is 30s or 60s, and you need to pay attention to this when the watch is stopped mechanically. When calculating time, add them all up.

Specific mechanical stop timing:

Small plate: Generally speaking, there are two types of scales, one is 30 scales and the other is 60 scales. The 30 scale means that each grid is a minute, and the 60 scale means that each grid is a minute.

**:** The number of rotations per revolution is that each revolution represents 30 seconds, and the whole ** is a total of 60 early school scales, of which there are 5 small scales between every two large scales. Therefore, the large scale of each grid represents the second, and the small scale of each grid represents the second, which is why the accuracy of the stop watch is the reason for the second, in the process of calculation, we must pay attention to these to avoid miscalculation.

The basic calculation flow of the reading is: the number of minutes of the small disk + the second reading of **. In the process of reading, it is easy to make errors in the order of order, resulting in errors in the final time.

Therefore, when reading, you should first read the scale on the small disk, the unit on the small disk is minutes, check the number above, you can know that each minute is divided into the first half minute and the second half minute, but pay attention to see if it points to which half a minute.

When reading **, its unit is seconds, assuming that the first half minute should be read as 0-30s, and if it is the second half minute, it should be read as 31-60s. Basically, this is how the mechanical stop meter is read.

After reading the above content, do you have a general understanding of how to look at the mechanical stop watch? In fact, the view of the watch is basically the same, the scale of the minute hand and the hour hand should be accurate, and at the same time, it is also necessary to pay attention to whether the final calculated time is in line with the scale of the watch. In tests and other work that requires precision instruments, the precision of mechanical stop can greatly promote the development of work and determine the accuracy of time.

Therefore, it is necessary to be careful to grasp the accuracy of mechanical stop watches.

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