The scale shows the weight incorrectly. Repair of electronic floor scales

People who use pocket scales for work or everyday life are well aware of the importance of their flawless work. Often, reputation and earnings depend on the correctness and accuracy of weighing, for example, in a jewelry workshop, and when dosing medicines or gunpowder for bullets, health or even life.

Unfortunately, any device, due to certain circumstances, can malfunction, what can we say about mini-scales, which are often carried in your pocket, along with coins and small debris. Due to irregular cleaning or improper storage, temperature fluctuations and humidity levels, such devices begin to give some error, which is completely unacceptable in their operation.

Calibration of Chinese scales: how to avoid it?

Most of the devices on the market today are made in China, taking into account all the latest technological advances. What is worth only one display on liquid crystals, as well as a whole range of functions and button combinations.

They are not subject to certification, as they are not registered as a measuring instrument. But they, due to their wide distribution, were nevertheless metrologically tested, as a result of which they were unofficially assigned to the second level of accuracy according to the requirements DSTU EN 45501:2007. In such devices, the error is less than one sample.

In order for the devices to show accurate numbers, and you do not frantically remember how to calibrate the electronic scales, follow these simple rules:

• work with devices at room temperature, avoiding its sharp fluctuations;
• keep the balance clean and dry;
• use them on flat surfaces, away from vibrations and other electronic devices;
• handle them with extreme care, do not shake, do not knock on the body, place weighed items in pallets carefully and slowly.
• monitor the battery charge level, change or recharge them on time.

How to calibrate an electronic scale for clear and correct operation

If, nevertheless, your electronic assistant requires clarification of the settings, carry out this process according to the manufacturer's recommendations. The step-by-step calibration process can be represented as follows:

1. Install the device on a perfectly flat surface, without level differences.
2. Turn on the balance - the On / Off button, the display will show the reference point - 0.0 or 0.00.
3. Check the correctness of the selected units of measurement - depending on the need, these can be grams, ounces, hoists. The selection is made with the MODE button.
4. Select the MODE key (maybe UNIT), and hold it down for at least 3 seconds, waiting for the abbreviation CAL to appear.
5. Use MODE again: the CAL signal will glow intermittently, and then change to a number, depending on the type of scale, i.e. 100, 200, 300, 500.
6. Place the desired weight on the pallet, the word “PASS” will appear on the display and the scale will automatically switch to the “Weighing” option.
7. Remove the weight from the scales and turn them off. Everything, the calibration of the Chinese scales has been carried out.

A reasonable approach to operation and careful attitude to the scales will allow them to serve you for a long time and reliably, and a properly performed calibration will ensure maximum accuracy of the result.

Floor scales in recent years have become a familiar attribute in almost every home. Modern women, striving to meet the ideals of beauty, carefully monitor their own weight. In addition, weighing in accordance with the norm means being healthy. Therefore, this device is a must if your loved ones suffer from serious chronic diseases: diseases of the endocrine system, disorders of the cardiovascular system, etc. Scale readings indicating weight gain are a signal to change the diet.

Manufacturers offer us a huge range of these useful devices. Which floor electronic scales are better to choose is an urgent problem. What parameters should be followed when choosing?

Floor scales: mechanical or electronic?

Mechanical scales are simple in their design: they do not have electronics, the weighing process is based on compression - tension of springs. But from the point of view of mechanics, such scales have a high level of error (not accurate readings). They are designed for a certain weight of people, and persons with a large weight do not have the opportunity to use mechanical scales. Well, and, most importantly, this type of scale is most often produced by small, unknown manufacturers, which cannot be found in the event of a breakdown of the scale. Therefore, we advise you not to buy into the low cost of mechanical scales, but to purchase more accurate and reliable electronic scales.

Floor electronic scales with memory

Many models of electronic scales are equipped with a special device - a memory block, which allows you to save the instrument readings that were previously. You can easily compare your current weight with how much you weighed, for example, a week ago. You can also record the weight of several people if your family is large enough.

Additional scale functions

Electronic scales have additional features depending on the brand and price. The most popular of them:

• calculation of BMI () - height and weight are correlated;
• determination of the ratio of fat - muscle mass;
• signal of a significant change in body weight.

There are also models of weights that, by analyzing your parameters, issue recommendations for a diet. It is clear that the cost of scales with additional features is higher than the price without them, so when purchasing a device, think about whether you are ready to overpay for something that you can perfectly do without.

Scale design

When we are surrounded by beautiful things, we get aesthetic pleasure. The issue of scale design is important for many women. The industry offers us a wide range of electronic scales: plastic, metal, wooden. Scales with a wooden surface are environmentally friendly, relieve static stress, plastic scales with rubber inserts protect against injuries associated with slipping. Choose what you like!

To date, electronic scales have become an integral part of human life. These devices are used both in the trading industry and in everyday life. In this article, we will tell you how to set up an electronic scale so that it shows the most accurate weighing results.

Varieties of electronic scales

Before you start setting up the measuring equipment, you should determine what categories of weights you can meet in everyday life. So, most often we are faced with the use of the following types:

• Desktop trading scales - most often we find such equipment in the halls of shops and small retail outlets. A distinctive feature of such weighing instruments is their small size and limited weighing limit.
• Floor warehouse scales - are used in warehouses, vegetable bases and wholesale outlets. Basically, large loads are weighed on such scales, for example, a bag of potatoes or other vegetables.
• Floor electronic scales for determining the mass of a person. This equipment is available in almost every apartment where they care about their own health and weight loss.

Important! All types of weighing equipment need timely maintenance, which includes the setup procedure.

How do scales work?

The principle of operation of all scales is the same and consists in placing a load on the surface of the platform, which affects the elastic elements and provokes their deformation. It is the magnitude of the deformation produced that is recorded using strain gauges. After the end of this procedure, an electric current of a certain strength is supplied to the electronic unit, which is electronically converted into mass readings on the display.

How to set up trading scales?

The principle of calibration of weighing equipment may differ somewhat, depending on its functional purpose and variety. If you are wondering how to set up a desktop-type scale for trading, then this procedure is carried out according to a fairly simple algorithm:

1. On the built-in control panel, press a special key that will put the electronics in the appropriate mode.
2. A specialized calibration weight is installed on the platform, which has a certain reference mass.
3. After a short period of time, the weight is removed from the platform surface.

Important! Setting the exact weight values ​​on the equipment is determined automatically. This procedure is controlled by the software installed in the electronic device.

When purchasing commercial scales, the owner is obligated to receive accompanying documentation, which specifies a certain frequency of weight checks.

Important! Unscrupulous sellers can set up electronic scales in their favor, usually such a setting is made due to the initial programming of the packing weight. Therefore, when going to the market for groceries, one should be extremely careful and give preference to large shopping centers and supermarkets that value their own reputation.

Setting up floor scales

Many women know firsthand the problem when, in an attempt to lose weight, you exhaust yourself with intense training for several days, do not eat after 6 pm, refuse various goodies and count calories, and the scales show weight gain. After being disappointed, most users of electronic equipment begin to doubt the accuracy of the weighing results and look for a way to set up an electronic bathroom scale. But did the equipment settings really go wrong, or did your efforts simply not bring the desired result?

How to check scales for accuracy?

Floor weighing equipment has its own technical characteristics and their lower limit of weighing is usually not less than 5-7 kg. Therefore, you should not try to check the accuracy of the device with dumbbells, barbell pancakes or three-liter jars filled with water. The devices are designed to determine the mass of a person, which means that all weighings with a different type of weight load distribution over the platform can provoke an error in the results.

To check the accuracy of a household appliance, it is necessary to weigh several times and record the results. For optimal results, at least 5 weighings should be done.

Important! When checking the accuracy of the balance, do not take significant breaks between weighings. Moreover, you should not eat, drink water, change clothes and perform other actions that may affect the result.

After a series of weighings, the difference between the largest and smallest value of the weight obtained should be calculated. Thus, you will receive an indicator of measurement error, which should not exceed a value of 0.4 kg. If your value exceeds this indicator, then we can conclude that the accuracy of the scales is impaired due to a malfunction of the sensors. The sensors can be replaced at the service center.

Some models of weighing equipment suggest the possibility of self-configuration in two stages:

• setting the weighing limit;
• setting the division value, which should not exceed 50 g.

1. Sometimes, to adjust the electronic scales, it is enough to change their location. Insufficient accuracy of the sensors in this case may be due to surface irregularities that are invisible to the human eye, but noticeable to electronic equipment.
2. If the balance suddenly began to give a significant difference in the weighing results, then a foreign object may have fallen under one of the legs of the equipment.

When it comes to floor scales, we prioritize maximum weighing accuracy. But often one has to face the problem when electronic scales show different weights in different parts of the room. Why is this happening? The reason may be due to several factors, one of which is the poor quality of the model. How to choose the right scales?

It is important to understand that not every model of electronic scales has small thickness. To distinguish electronic models from mechanical ones, you can carry out a simple procedure.

For the initial check of floor scales, you must do the following:

1. Turn on the device.
2. Put on the palm of one hand so as to avoid contact with the legs.
3. With the other hand, press the scales down a little.
4. If you are holding an electronic scale in your hands, and not a fake, the readings will be zero.

Selection guide

In order to avoid problems with purchased scales in the future, you should listen to the opinion of experts who recommend paying attention to the following points when buying:

1. If you come across a model with a choice of units of measurement, make sure that kilograms are present in the table.
2. For use in the bathroom, it is worth buying a model with moisture protection.
3. For comfortable use, choose floor scales not with a smooth, but with a rough surface.
4. When choosing a material, it is better to trust metal models, rather than plastic ones.
5. Don't skimp on the purchase. Cheap models are short-lived, the weight shown by them is not always accurate, and as a result, you will overpay for repairs or buying new scales.
6. Be sure to check the measurement accuracy before purchasing.
7. When working with scales on a carpet, the calculation error can be up to 10%.
8. Do not use models that are not designed for your weight.
9. Magnetic radiation from devices in the room can affect the quality of weighing, so make sure that the balance is located away from radio equipment.
10. When buying electronic models, choose a model with 4 sensors. This information is not always indicated on the price tag, so you will have to look into the device passport.
11. The more built-in functions in the device, the greater the error of their calculations. Try to choose simple and reliable models.

Do not forget that electronic scales run on batteries that need to be changed at least once every 6 months.

During weighing, do not bend over or step from one foot to the other. Scales that are sensitive to any changes will show different weights. The reason for inaccurate results here will be you, not the measuring device.

Rules for care and use

Any models of electronic scales are very sensitive to various changes. Thanks to this feature, they can show the result with precision. up to hundreds of kilograms. However, this positive moment can turn against you if you use them incorrectly.

In order for electronic scales to show an accurate result, you should follow two simple rules:

1. It is recommended to use them only after installation on a flat surface. If your floor is uneven or sloped, then the meter will give inaccurate results.
2. When measuring body weight, it is important to stand correctly on the surface of the scale. Your feet should not hang from the area of ​​​​the device, but should be parallel to each other. And you yourself should not move or bend over.

If you shift the weight to the toe of the foot, then you will weigh a couple of kilograms more. When shifting body weight to the heel, you will lose about 500 grams.

For correct operation, it is important not only to choose and use the device correctly, but also to use it in a quality manner. look after. By following a few tips for maintaining your instrument, you will achieve a longer life and accuracy when weighing:

1. Electronic scales are known to be extremely sensitive. Therefore, sudden changes in temperature, a large amount of moisture, sudden lowering or shaking, dirt and direct sunlight should be avoided.
2. Do not bring scales near heating devices.
3. It is not recommended to use chemicals to clean the device.
4. Avoid spilling various liquids on the surface of the measuring unit.

Conclusion

When answering the question why your electronic scales always show different weights, we can safely talk about two factors. First, your electronic model is a mechanical fake. Second, your floor surface is not perfectly flat. If both of these factors are absent, and the scales still show incorrect results, you should contact the master, most likely your device is broken.

Today, being slim is not just fashionable, it is already a way of life for many people. Of course, you can't do without weights. Few people use mechanical devices anymore, since electronic models are relatively inexpensive, and the accuracy of the readings is higher.

But there is one problem, often the electronic versions show different values. Let's take a look at the possible reasons, shall we?

Reasons why electronic scales show the wrong weight

Why the display may show different weights:

• There is an uneven surface under the device. Electronic models are very sensitive devices, therefore, if they stagger when standing on them, then the surface under them is uneven, and you should look for another place in the apartment for them;
• Blockage formation. If the device is used for a long time and stored without a box on the floor, it could become clogged. It is necessary to disassemble it and carefully clean all the elements with a brush with soft bristles;
• Failure in work. This problem may be caused by a violation of the weighing rules. The recommendations to follow when weighing are listed below.

How to fix the problem

What to do: electronic scales show the weight incorrectly? If none of the above reasons fit, then they may be broken. The malfunction may be as follows:

1. The batteries have worn out.
2. The connecting cable departs - this is the element connecting the electronic board and the display, in case of a malfunction it will distort the data. The board should be pressed closer to the display.
3. The relay is faulty, for example, the contacts are thinner.
4. The mechanism is damaged - due to exceeding the permissible weight or incorrect use of the device.
5. Incorrect calibration also leads to data corruption.

Why do electronic scales show different weights? New models must be calibrated in production. Many models provide automatic calibration. However, the measurement accuracy may be impaired if they are stepped on several times in a row or moved frequently.

In this case, the calibration can be done independently. Methods for calibrating the scales can be found in the instructions for the device, and this does not require any special skills.

Do electronic scales show different weights even though they are in good condition, do not need to be cleaned or calibrated? Then follow the following recommendations when taking measurements:

1. It is necessary to place the scales only on a flat, solid surface, and always take measurements in the same place.
2. During the measurement, it is important to stand on the device correctly. Feet should be placed parallel to each other. They must not move towards the edges or hang from the surface of the balance. You must stand upright and calm. Do not lean on the wall or other furniture.
3. All nutritionists recommend weighing yourself in the morning on an empty stomach, without shoes and in a minimum amount of clothing. Weight can change upwards during the day due to the amount of food eaten and fluids drunk.

For electric scales to serve for a long time, it is impossible.

To eliminate the problem, slightly lift the board and press it firmly against the display. This manipulation is carried out using a wooden block, which is installed between the element and the body.

• Displaying erroneous information on the monitor. The determination of inaccurate weight occurs, often, when the contact ends of the device become thinner. The problem is eliminated by replacing the corresponding relay in the mechanism device.

Remember, the contact ends of the equipment must fit snugly against the special supports of the electronic device.

• Clogged floor equipment. During the operation of the device, dust gradually settles on the internal elements of the structure. Such clogging, as a rule, leads the mechanism to an inoperative state. To resolve this problem, clean the device regularly using a dry towel.

Remember, water entering the working mechanism can cause damage to the equipment.

Determination of inaccurate weight. Incorrect operation of the scales is often the result of incorrect calibration of the electronic device. To restore the exact settings, press the button of the same name on the device and hold it until the word “CAL” appears on the display. As a rule, the duration of this process is about 30 seconds. Then the display will show the digital value of the weight, with which it is necessary to calibrate. Any subject can act as a standard. However, the exact weight must be indicated on it. Then the standard is placed on the balance and waiting for the word "PASS" to appear on the screen. After calibration is completed, the resulting weight value is removed and the device is turned off.

If the device setup is unsuccessful, the message “FAIL” will be displayed. In this case, the procedure must be repeated.

• Failure of the mechanism. This failure often occurs as a result of overloading the device. That is why, before buying a device, it is important to determine the maximum allowable weighing rate, which is strictly forbidden to go beyond.

Otherwise, deformation of the power elements of the frame occurs. To restore the operability of the device, they should be straightened using a building level, caliper or a special corner.

Remember, during the troubleshooting process, do not touch the display. This element is located under hermetic glass and accidental penetration of air under the protective surface contributes to the violation of the polarization of the crystals. As a result, the screen turns black and streaks appear on it. For this reason, the fitting that secures the display should not be disassembled.

As a rule, restoring the operation of old parts or replacing them with new ones leads to the normalization of the functioning of the electronic mechanism.

Breakage of load cells

One of the most serious problems that occurs during the long-term operation of electronic structures is the breakdown of strain gauges.

As a rule, floor scales of this type are equipped with a fixed platform and special supports, with the help of which the weight is measured. Under the legs of the device, there is a solid frame, which is made of a special alloy of metals. Due to the presence of this element, the frame bends during the operation of the device, and after the termination of exposure, it returns to its original position.

Each frame is often equipped with a small plate that acts as the main sensor node in the electronic product.

The sensitive strip, as a rule, is imprinted into the frame and filled with a special adhesive (compound). Three wires are connected to it, which provide a measurement of the bridge resistance.

During the operation of the device, the four frames are bent at the corners and redistribution of the excess load. The electronic device automatically summarizes all the readings and displays the result on the scoreboard using the printed circuit board.

Remember, during operation, the frame of the floor device is easily destroyed when exposed to a weight that exceeds the allowable parameters for this equipment. As a rule, in this case there is a curvature of the power elements of the frame.

Straightening the frame will help to eliminate such deformation. However, if there is no damage during visual inspection, then a special device, an ohmmeter, should be used to identify the malfunction. To do this, each sensor is carefully soldered from the board and the resistance between the three electrical wires is measured. If the device is in good condition, this indicator in the four corners is the same weight.

In the event of a wire break, the tester will show a different resistance value. If a problem is found, carefully clean the sensitive plate from the compound.

There are times when three wires soldered to the plate are cut off. If a problem is detected, electrical connections are restored using soldering equipment. As a rule, this procedure allows you to resume the full functioning of the weight structure. However, in some cases, the device does not work due to a malfunction in the resistive sensor. In this case, the unusable mechanism should be replaced.

Remember, any mechanical damage to the sensor part often leads to failure of the entire structure assembly.

Before buying floor scales, you should carefully study the features of the functioning and technical characteristics of the device.

When choosing an electronic device, the following nuances and recommendations should be considered.

Weight measuring system. As a rule, European manufacturers measure a person's weight in pounds.

Remember, the floor scale measurement system must be metric.

Housing material. When choosing a device, preference should be given to models with a metal base. Products made of plastic, as a rule, are short-lived and quickly lose their original shape.

Instrument stability. When buying floor scales, you should check the availability of mechanisms that allow you to install the equipment on an uneven surface.

Check scale accuracy. For this purpose, it is necessary to put a packaged product on the device or compare its weight on different devices.

Choose the right equipment location. The touch mechanism of the balance may be affected by electromagnetic radiation from nearby radio equipment or other powerful devices. Therefore, to determine the exact weight, you should place the device away from these units.

Remember, timely maintenance of electronic scales will help minimize the likelihood of breakdowns during the operation of this equipment.

If a malfunction is found, corrective action should be taken immediately. However, if it was not possible to eliminate the problem on your own, you need to contact the service center for help.

Regular maintenance of good quality electronic scales will be the key to stable and trouble-free operation of this device.

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Electronic scales show different weights for many reasons. Some of them are fixable at home - you just need to replace a dead battery or clean clogged contacts, others require the intervention of specialists. First of all, it is important to determine what exactly caused the error.

Reasons why electronic scales show different weights

There are failures in the operation of electronic devices when indicators of such a smaller or larger weight are given that there is no question of an acceptable error. Quite common are discrepancies in the results in different parts of the room, which is a consequence of:

• incorrect operation;
• factory defect;
• calibration failure;
• breakdowns.

Important! When buying scales, it is worth weighing an object with a fixed mass on them several times. Serviceable devices will always give the same value, even in different places.

Violation of the weighing rules

The principle of operation of electronic scales is to convert a mechanical effect into an electrical signal through strain gauges– sensors that react to the slightest changes in the position of special plates or frame (depending on the design). Data from strain gauges is processed by a microprocessor that displays information on the screen. This is how some models of devices from the Polaris brand and other manufacturers work.

Violation of the rules of operation significantly affects the results. Even when weighing is carried out in one place, the balance will “lie” if:

• unevenly distribute body weight on one side of the platform;
• use them near heating sources or expose them to significant temperature fluctuations;
• carry out the procedure on a carpet or be weighed on a floor that has an uneven surface;
• put the scales next to appliances (TV, computer, microwave, washing machine) - the device will be affected by magnetoelectric signals emitted by household appliances and distort the results.

It can be difficult to achieve objective data by weighing a baby several times in a row. The difference in readings can be caused by an incorrect position - while on the scales, to obtain a reliable result, you should stand straight, without bending or moving. The instructions for each device contain detailed rules for use - you just need to carefully study it before starting operation.

If the scales give different results in the morning and in the evening, and mostly upwards, this may also be due to improper operation of the device.

Advice! Food and liquids consumed during the day increase body weight. Nutritionists recommend weighing yourself at the beginning of the day, before breakfast.

Malfunctions

The relative simplicity of the design of electronic scales implies the reliability of their work, subject to the necessary conditions prescribed in the instructions. However, there are also failures.

Damage can be identified by:

• battery problem- when the batteries are dead, the display informs about an error or does not give any data at all when turned on;
• disconnection of the connecting cable- a link between the electronic filling with an information screen that will report inaccurate data;
• relay failure, more precisely, the thinning of its contacts leads to a distortion of information during re-weighing;
• device clogging- debris and dust accumulate inside the case over time, affecting the operation of electronics;
• mechanism damage– due to excess of the permissible weight or incorrect use, the device will stop turning on;
• wrong calibration leads to data corruption.

Calibration failure

The design involves the collection and summation of information from several strain gauges, so a malfunction in the operation of one of them will affect the final indicator. The setting eliminates measurement errors.

As a rule, new devices are calibrated by the manufacturer, even if self-configuration buttons are provided. The accuracy of the scale may be impaired if it is stepped on several times in a row or moved.

There are 3 options for solving this problem.

1. Auto-calibration is a self-tuning feature available in newer models.
2. The external method is the use of a test weight with a fixed mass.
3. Built-in calibration - in this case, the reference value of the load is already inside the device.

A prerequisite for tuning is slight data deviations at different times of the day. Methods for calibrating the device are described in the instructions for each specific model and do not require special knowledge.

How to make the scales show correctly

First you need to determine whether the device is really giving out information incorrectly. To do this, it is recommended to weigh yourself 5 times in a row, recording the results. The difference between the maximum and minimum values ​​​​will be the error allowed for home floor scales. If it exceeds 50–300 g, then the device is defective. However, this procedure will be objective only if the above problems (malfunctions, factory defects, calibration violations) are excluded.

It happens that devices that have not been used for a long time are buggy when turned on or at certain parameters. If the display shows LO, the battery needs to be replaced. When the error is not corrected by rebooting (switching off and on the balance) or thorough but careful cleaning of the internal elements, the intervention of specialists is required.

Advice! On the Internet you can find many tips and video tutorials on self-repair. It is worth remembering that even to repeat the actions on the video, certain knowledge and skills are needed. Otherwise, you can permanently disable the device.

Manufacturers try to minimize the error of readings with inaccurate use of scales. Data is processed from several sensors around the entire perimeter, giving an average value, even if the load is shifted.

To obtain an objective result, you need get up on the floor platform correctly:

• do not move to its borders;
• stand upright, avoiding bending;
• be weighed with a minimum amount of clothing, barefoot;
• feet should be parallel to each other;
• Do not stick to walls or furnishings.

For weighing, you need to choose a specific time, preferably in the morning, before breakfast. The balance must be placed on a horizontal (without slopes) solid surface.

Advice! Electromagnetic radiation from household appliances affects the sensitive sensors of the scale, so they must be located at a distance of at least 80 cm. If the device has not been used for a long time, it is advisable to calibrate it for accuracy using one of the three methods mentioned above.

In order for the scales to always show correctly, it is enough to provide them with proper care and use, adhering to the recommendations given.

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