Do vernier calipers have to be forcibly inspected?

You need to use vernier calipers to measure the diameter of lollipop sticks in the production of lollipop sticks, then the vernier calipers must be sent to the state-authorized measurement technology institutions for verification, which is stipulated in the national "Metrology Law", which is within the scope of compulsory verification management, so it must be verified, obtain a verification certificate, and the vernier caliper should be pasted with a qualified logo.

According to China's "Metrology Law", vernier calipers are compulsory inspection items, and should be sent to the metrology administrative department or a qualified metrology verification agency for verification, but also according to the specific situation of the company.

Vernier calipers are used for process control, not the category of compulsory inspection, and the internal school can be carried out, but the internal school is also to build a standard! That's what I have right now. Calibrating calipers, you need to use standard measuring blocks, flat plates, knife-edge rulers, that is, these things are sent for inspection, do not build standards, and it is not legal to carry out verification, and the Quality Supervision Bureau can also issue bills!

Here's how to look at the vernier caliper:

1. Look at the main ruler first: find the nearest main ruler scale on the left side of the 0-digit scale of the vernier ruler on the main ruler, and this scale is the number of millimeters measured.

2. Look at the vernier ruler again: find the tick value aligned with the scale on the vernier ruler and the main ruler, the scale 1 on the vernier ruler represents, and the scale between the values can be calculated according to the number of tick marks between the scale values.

3. Combining the scale values of the main ruler and the vernier ruler together is the actual size of the measurement. The measurement dimensions shown in the figure below are.

Vernier Calliper is a measuring tool for measuring length, inner and outer diameters, and depth. The vernier caliper consists of two parts: the main ruler and the vernier attached to the main ruler that can slide.

The main ruler is generally in millimeters, and the vernier has or 50 sub-grids, according to the different sub-grids, vernier calipers can be divided into ten-degree vernier calipers, twenty-degree vernier calipers, fifty-degree vernier calipers, etc., the vernier is 10 divisions of 9mm, 20 divisions of 19mm, 50 divisions of 49mm.

There are two sets of movable measuring jaws on the main ruler and vernier of the vernier caliper, which are the inner measuring claw and the outer measuring claw, the inner measuring claw is usually used to measure the inner diameter, and the outer measuring claw is usually used to measure the length and outer diameter.

Vernier caliper is a measuring tool for measuring length, inner and outer diameter, and depth. The vernier caliper consists of two parts: the main ruler and the vernier attached to the main ruler that can slide. If you look at it from the back, the cursor is a whole. The depth gauge is connected to the vernier ruler to measure the depth of the groove and the cylinder.

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It's very simple to find a standard part card to calibrate.。。。 Look at the difference between your card and the standard piece is his tolerance.

1 Vernier calipers are more precise measuring tools, which should be handled with care, and should not be collided or dropped to the ground. Do not use it to measure rough objects when in use, so as not to damage the measuring jaw, avoid putting it together with the cutting tool, so as not to scratch the surface of the vernier caliper, and should be placed in [1] when not in use

Dry and neutral place, away from acids and alkaline substances, to prevent rust. 2.Before measuring, the caliper should be cleaned, check whether the two measuring surfaces of the caliper and the measuring edge are straight and undamaged, and there should be no obvious gap when the two measuring claws are tightly fitted, and the zero engraved line of the vernier and the main ruler should be aligned with each other.

This process is called proofreading the zero position of the vernier caliper. 3.When moving the ruler frame, the movement should be free, not too loose or too tight, and there should be no shaking.

When fixing the frame with set screws, the reading of the caliper should not change. When moving the frame, don't forget to loosen the fixing screws, and don't let them loosen so as not to fall off. 4.

When measuring parts with vernier calipers, it is not allowed to apply excessive pressure, and the pressure used should be such that the two measuring jaws are just touching the surface of the part. If the measuring pressure is too large, not only will the measuring jaw bend or wear, but also the measuring jaw will produce elastic deformation under the action of pressure, so that the measured size is not accurate (the outer size is smaller than the actual size, and the inner size is larger than the actual size). 5.

When reading on the vernier caliper, the caliper should be held horizontally, towards the direction of the bright light, so that people's line of sight is as perpendicular to the engraved surface of the caliper as possible, so as to avoid reading errors caused by the skew of the line of sight. 6.In order to get the correct measurement results, it is possible to measure several more times.

That is, measurements are taken in different directions on the same section of the part. For longer parts, measurements should be made at various parts of the full length to obtain a more accurate measurement result.

What is the specific use of vernier caliper?

1. The measuring range is generally 300mm, etc., and its structure is mainly composed of the ruler body, the ruler frame, the fastening screw, the vernier, the adjusting screw, and the leaf spring. 2 Depth vernier calipers are mainly used to measure the depth of workpieces such as stepped shapes, blind holes, and curved grooves. Precautions for the use of depth vernier calipers:

1. When measuring, first attach the measuring surface of the ruler frame to the top surface of the depth of the workpiece, pay attention not to tilt, and then push the ruler up until the ruler body is in contact with the depth of the measurement, and then the reading can be done. 2. Due to the small measuring surface of the ruler body, it is easy to wear out, so it is necessary to check whether the zero position of the depth gauge is correct before measuring.

Vernier calipers measure length, inner and outer diameters, and depth. The vernier caliper consists of two parts: the main ruler and the vernier attached to the main ruler that can slide. There are two movable measuring jaws on the main ruler and vernier caliper, which are the inner measuring claw and the outer measuring claw, the inner measuring claw is usually used to measure the inner diameter, and the outer measuring claw is usually used to measure the length and outer diameter.

Vernier calipers measure length, inner and outer shirt hole diameter, and depth. The vernier caliper consists of two parts: the main ruler and the vernier attached to the main ruler that can slide. There are two movable measuring claws on the main ruler and vernier caliper, which are the inner measuring claw and the outer measuring claw, the inner measuring claw or seepage is usually used to measure the inner diameter, and the outer measuring claw is usually used to measure the length and outer diameter.

Vernier calipers measure the width of the workpiece, measure the outer diameter of the workpiece, measure the inner diameter of the workpiece, and measure the depth of the workpiece. Vernier caliper is composed of two parts: the main ruler and the vernier attached to the main ruler that can slide, and is a measuring tool for measuring length, inner and outer diameter, and depth, and the main ruler is generally measured in millimeters.

Vernier calipers can be divided into vernier calipers, 20-degree vernier calipers, and 50-degree vernier calipers according to the different grids.

Vernier calipers originated in China at the earliest, and are the most widely used high-precision measuring tools for Yiyun cultivation, and are the extension and expansion of the engraved ruler.

The vernier caliper, which has the most modern measurement value, is generally considered to have been invented by the Frenchman Jonier Beale.

Summary. The vernier caliper reading on your side is, first look at the symmetry point of the lower caliper and the upper caliper, the first point should be after 14, and then look at the reading below, the reading after the decimal point should look at the place where the entire size line coincides, you can look back at the position of the last 9 The sixth decimal point coincides, so the size is oh. That's all for me, I hope mine can help you.

That's how much. The vernier caliper reading on your side is, first look at the symmetry point of the lower caliper and the upper caliper, the first point should be after 14, and then look at the reading below, the reading after the decimal point should look at the place where the entire size line coincides, you can look back at the position of the last 9 The sixth decimal point coincides, so the size is oh. That's all for me, I hope mine can help you.

Summary. Dear, hello, I am happy to answer your questions, vernier calipers are used to read the spacing of the main ruler scale and the spacing of the secondary ruler scale. Taking vernier calipers as an example, the scale spacing of the main ruler is 1mm, when the two feet are combined, 49mm on the main ruler is just equal to 50 grids on the sub-ruler, and the length of each grid of the sub-ruler is =.

The reading of the vernier caliper is made up of the readings of the main ruler and the vernier ruler. The integer part of the part size can be read out on the main ruler engraved line to the left of the vernier zero line, and the decimal part smaller than 1 mm can be read out with the help of the vernier reading mechanism. Due to the size difference of the verniers, vernier calipers are usually made up of three precisions.

I hope my answers help you and I wish you a happy life.

How to look at vernier calipers.

That's how much. Dear, hello, I am happy to answer your questions, vernier calipers are used to read the spacing of the main ruler scale and the spacing of the secondary ruler scale. Taking vernier calipers as an example, the scale spacing of the main ruler is 1mm, when the two feet are combined, 49mm on the main ruler is just equal to 50 grids on the sub-ruler, and the length of each grid of the sub-ruler is =.

The reading of the vernier caliper is made up of the readings of the main ruler and the vernier ruler. The integer part of the part size can be read out on the main ruler engraved line to the left of the vernier zero line, and the decimal part smaller than 1 mm can be read out with the help of the vernier reading mechanism. Due to the size difference of the verniers, vernier calipers are usually made up of three precisions.

I hope my answers help you and I wish you a happy life.

Just tell me how much is on the **.