In recent years, quality supervision departments at all levels have strengthened the supervision of people's livelihood measurement and implemented a series of measures to truly "focus on people's livelihood and measure the benefits of the people." As one of the most common trade settlement measuring instruments, electronic scales are closely related to the daily lives of ordinary people. The accuracy of electronic scales in the market is also the most concerned issue for ordinary people. However, many unscrupulous traders often make essays on electronic scales to punish ordinary people in order to obtain illegitimate interests. Therefore, as a member of the metrological verification work, some common sense accumulated in my work, here is a brief summary of some common electronic scale methods and preventive measures.

Second, cover the display of subtitles

The general electronic price scale has three display windows of weight, unit price and price. Some merchants deliberately use the messy goods piled up on the booth to cover the window of the customer side, so that the customer can't see the price, and the customer does not pay attention. Enter the increased unit price to deceive the customer. In order to prevent this method, the customer can carefully see the display of the three windows and then settle.

Third, the impact of leverage

When weighed the goods, the traders threw the goods into the weighing pan. Due to the impact force, the display weight was instantly magnified. When the weighing pan was stabilized, the customer did not have time to look at it and picked up the goods to report the price. Customers can stop the traders by asking them to take care of them and put them in order.

Fourth, even the weighing pan for sale

When purchasing goods, some vendors deliberately do not put the weighing pan on the scale, and use the customer's negligence or attention to concentrate, and put the goods and the weighing pan together on the scale to weigh. Thus, the weight of the weighing pan is also calculated as the weight of the product. As long as consumers pay attention when they are shopping, such skills will not succeed.

Five, under the feet of the scales

The electronic scale is weighed and displayed by the change of the electrical signal output by the load cell when it is subjected to an external force. The sensor must be subjected to vertical force and stabilized before it can output an accurate change signal. Therefore, when using the electronic scale, it must be placed horizontally and stable before weighing. However, as long as you pay close attention to it, you will find that most of the electronic scales in the farmer's market are not level, and some cardboard, foam or other debris is placed under the scales, which causes the weighing to be inaccurate to obtain illegal profits. Therefore, when shopping, consumers must ask for the scale to be placed and then measured.

Sixth, reserve the base in advance

Under normal circumstances, the display of subtitles should be zero when the scale is empty. However, some vendors use the sloppy intention of the customer to deliberately reserve a certain base on the scale. When weighing, the reserved base is settled together with the purchased goods to defraud. customer. As long as the customer carefully observes, this will be eliminated.

Seven, fingers

Before weighing the goods, the trader took the goods in one hand, the other hand restored the scale to zero, one finger on the keyboard, and another finger sneaked into the corner of the scale or under the weighing pan, quietly lifting the weighing pan, Destroy the level of the scale, and then quickly put the goods on the scale, so that the weight weighed is the sum of the weight that he carried out by hand and the actual weight of the goods. This type of method is the same as the footing principle, but the action is quick and the customer is not easy to guard against.

Eight, water injection method

Commonly used in the sale of aquatic products, the traders will make the rubber tube into the frame of the fish net. In the process of fishing the fish and shrimp, the pipe is also filled with water, and then the fish and shrimp are quickly removed and put into the bag together with the water in the rubber tube. Weighing. This type of method is not easy to get rid of because it is easy to be seen.

Nine, magnet

This type of method should be considered the most "traditional" way, since ancient times. Unscrupulous traders will pre-position magnets on the bottom of the weighing pan to change the weighing display of the electronic scales to defraud more profits. Due to the relatively complicated operation control, it is not used much now.

Ten, install a remote control

By installing an electronic receiving device inside the electronic scale, the vendor secretly uses the remote control to secretly change the weighing display and obtain illegal income. This type of method is common in wholesale markets, trading in large amounts and weights. This illegal activity has been common in market audits in recent years, and it has been repeatedly banned. Because of its high concealment, it is difficult to obtain evidence, which seriously disrupts the market order and is extremely harmful.

Eleven, add buttons

By illegally modifying the circuit structure of the electronic scale, installing the hidden button or tampering with the original function of the button, when the button function is not used, the weight weighed is accurate. When the button function is used, the weight can be artificially controlled. More or less, this is what people often say nine or two scales, eight two scales, seven two scales. This kind of method is concealed and difficult to find. It is very common all over the country, so consumers should be cautious.

The above-mentioned common electronic scale methods are briefly introduced, because some of the traders' hands and feet are agile, and some are because the internal structure of the electronic scale is modified. Therefore, it is very difficult for ordinary people who are non-metering professionals to prevent it. Therefore, in the ordinary life, the average consumer can pre-weigh the weight of the items carried on the standard scale, such as keys, bracelets, etc., remember their weight, when they suspect that there is a problem with the electronic scale on the market. Put these items on the weighing. If the data is different, you can preliminarily determine that the weighing is not accurate. This method is simple and easy, and the facts are also very effective.

In addition, the electronic scale used for trade settlement belongs to the national mandatory verification measuring instrument. When the consumer is trading, it can check whether the electronic scale has the qualified label and the validity period of the national mandatory verification. Also, when you are spending at hotels and restaurants, especially when you are buying aquatic products such as seafood, you must look at it yourself and pay close attention to the whole weighing process to avoid being pitted. Finally, consumers should develop good habits to obtain consumer credentials. If necessary, they can protect consumers’ own rights by reporting to the quality supervision department or exposing them to the media.