Recently, a news link entitled "Coffee market under the electronic scales under the foam box, see the place to buy food, this must see!" news link widely spread in the Lanxi people's WeChat circle of friends. The news said that the electronic scale pad will increase the weight of fruits and vegetables on the foam box, and be careful to buy "black scales" when going to the market. Is this saying reliable? The reporter recently launched an investigation.
Rumor 1: The foam scale or paper box is placed under the electronic scale of the market. Is this true?
When the Ms. Zhang forwarded the news link, she wrote such a passage: It’s true! When I went to the market to buy food, no matter the food stall or the fruit stand, the electronic scales were filled with foam boxes or paper boxes. It was a lot of money by the merchant's "black heart scale".
Is Ms. Zhang really true?
In order to verify her statement, the reporter went to the Huanglongdong vegetable farm, the Beimen vegetable farm and the Xixi vegetable farm in the urban area. It was not common to find the foam box or paper box under the electronic scale of the booth.
In these three vegetable markets, the reporters visited the vegetable area, the fresh meat area and the aquatic area, and found that the vendors placed the electronic scales on the electronic scales of the vegetable market, or laid flat on their own prepared wooden scales. On the cabinet, only a few vendors put a rectangular empty basket upside down, laid a wooden board on it, and placed the scale on the board.
The reporter asked: “Why do you want to place the electronic scales like this?†The merchant replied: “In order to let the citizens who buy vegetables can see the price.â€
The first rumor is not broken.
The electronic scale placed by the vegetable farmers in the market.
Rumor 2: The foam box or paper box under the electronic scale will increase weight. Is this true?
After a field investigation by the reporter, it was confirmed that the rumors that "the electronic scales in the Lanxi market are almost filled with foam boxes" are false news. Even so, there is still some doubts, why are there people who want to put on the foam box?
Some vendors said that the foam box is actually a change box, put the scale on it, put the change below, and it is convenient when looking for money.
There are also vendors who say that they are selling fruits. The front fruits are old and high. They don’t take a foam box. People can’t see the readings and they won’t worry.
As for the saying that the foam under the electronic scale will make the goods gain weight, a street vendor will wave straight to the hand: "How is this possible? The online saying is not all true." When the reporter proposed that the vendor buy vegetables, The weighing of the test pad foam box and the non-pad foam box was rejected by the vendor, and the street vendor next to it laughed.
This makes people inevitably guilty: Is the foam box really an "accomplice" of "black scales"?
The second rumor, the reporter did not get too much effective information from the vendors.
The four “ugly eight†weighs in the paper box and the electronic scale without the paper box, and the weight is 0.900 kg.
Experimental rumors: electronic scales are less than two pounds, not a foam box or a paper box.
Is it true that the rumors about the electronic scale and the foam box "partners"?
During the visit, the reporter found that in a small alley in Xixi Commercial Street, there was a temporary fruit stall, and the stall owner placed the electronic scale on the paper box. Therefore, in order to verify the rumors, the reporter selected four "ugly eight strange" in the fruit stall. After the stall owner weighed, the electronic scale showed 0.900 kg. After paying the money, the reporter took the four "ugly eight stranges" to the electronic weighing platform of a chain of fruit supermarkets not far away. The electronic scale of the chain fruit supermarket showed the number of grams is still 0.900 kg.
The results of the experiment were quite surprising, and there was no rumor that “increased weightâ€.
After listening to the reporter's intention, a person in charge of the chain fruit supermarket Liu told reporters that some of the stalls in the vegetable market may want to put the scales up and make the scales more conspicuous, which is beneficial to customers to see the weight and price. "When the electronic scale is placed on the foam or cardboard, the weight weighed will be aggravated. I have not heard of this statement. If there is a shortage of two, we will make a penalty of ten." Liu said that the person in charge said, As long as the scale is balanced, the weight on the foam will not change.
At the "Reliable Scale" inspection point in the North Gate vegetable market, the enthusiastic staff made two small tests in order to dispel the reporter's doubts.
Test 1: The electronic scale was placed on a flat table, and the staff placed a standard stack of 1000 grams on the scale. The electronic scale showed the number of grams as 1000 grams, which was not bad.
Test 2: The electronic scale was placed on a foam board, and the staff also placed a standard stack of 1000 grams on the scale. The electronic scale showed that the number of grams was still 1000 grams, which was not bad.
The staff member told the reporter: "The general scales are also faked on the internal scale of the electronic scale. This kind of fake scales are usually produced by irregular manufacturers. When people buy food, they can see if they are attached to the scales. The certificate of compulsory verification. The cushion foam will not affect the weighing result, so consumers can rest assured."
Why did the weight of the foam box and the foam box not change under the electronic scale through experimentation?
The reporter asked a friend who studied Ph.D. in the Department of Physics at Zhejiang Gongshang University. She told reporters that this is a very simple principle of conservation.
The accurate use of electronic scales requires that the items be placed on a hard surface and balanced to four feet. If the foam and carton are hard and placed, it will certainly not affect the weight. However, if the texture is soft and the balance of the electronic scale is out of balance, there is a possibility of error, but such an error does not necessarily make the item "weight" or "lighten" the item. Because the electronic scale measures the weight of the item through the sensor, and the sensor is inside the electronic scale, if the four feet of the electronic scale are unevenly loaded, the sensor in the electronic scale will lose the "appropriate head".
The Ph.D. in the Department of Physics gave an example: if the foam and cardboard are unbalanced under the scale, causing deformation buffer and causing upward acceleration, this will cause the support of the tray to the object to be greater than the gravity of the object, which will cause overweight. The pointer reading of this scale will be too large.
Doctor of Physics explains its principle
Experts support the "black heart scale"
Through experiments, we found that the electronic scales are less than two cigarettes or paper boxes.
Today, electronic scales are an irreplaceable weighing tool. The way electronic scales are cheated is not the same. How can citizens avoid "black scales"?
The relevant person in charge of the Lanxi City Quality Supervision Bureau told the reporter that many electronic scales used in supermarkets, farmer's markets, vegetable markets, fruit shops, etc. are required to be verified and measured. After passing the examination, the law enforcement officers of the Quality Supervision Bureau will be the electronic The scale is labeled with a qualified label.
"But some unscrupulous vendors will be re-educated after passing the examination. This makes it difficult for consumers to identify whether the scale is accurate." The person in charge said that in this case, consumers can carry it with them. The weight of the mobile phone or water is clearly recorded, such as a bottle of mineral water about 500 grams, an iPhone6 ​​mobile phone 129 grams ... Once you find that the weight is too large, you can use your mobile phone and other personal items as a reference.
The person in charge reminded that if the public has doubts about the weight, they can ask the merchant to turn off the scale and restart it. In this process, you can't touch any button, re-weigh it after restarting, or go to the market to set up a fair scale after shopping.
Although the rumors are fake, but the reporter still wants to remind consumers: try to buy goods in the regular supermarket or vegetable market, do not buy in the street tour business; encounter "black heart scale", you can call 12365 quality technical supervision phone Complaints.
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