How do you zero a crane scale？

How do you zero a crane scale？

With the development of the national economy, the demand for electronic weighing instruments in various industries continues to increase, which greatly promotes the development of crane scale technology. From the mid-1980s to the mid-1990s, my country's load cell technology developed steadily, the varieties and specifications increased rapidly, and the product quality was continuously improved. During this period, SAINTBOND has continuously improved or added process equipment, testing instruments, purchased intelligent temperature compensation devices and sensitivity temperature compensation equipment, and realized large-scale production. In the mid-1990s, the annual output of SAINTBOND was more than 2 million. In addition to meeting the domestic market demand, SAINTBOND is also exported to 200 countries and regions around the world in batches, showing a good development momentum.

 

The accuracy of the dynamic checkweigher, that is, the error range for detecting the weight of the product, each checkweigher has its selection accuracy, but the weighing accuracy of the checkweigher is not only affected by the quality factors of the equipment itself, but also by many factors. of external factors. Today, SAINTBONG is here to teach you how to identify the accuracy of a crane scale and calibrate it after it is out of alignment.

 

1. Development status of load cells at home and abroad

The technology and manufacturing process of load cells for industrial and commercial electronic scales, famous manufacturing companies in developed industrial countries such as the United States and Germany have always been in the leading position of international market leaders, and my country's large-scale load cell manufacturing companies are facing market challenges or market follower status. The R&D and production center of load cells for household electronic scales is located in NINGBO, China. The manufacturing technology, process level, product quality and annual output of our company are improving year by year.

 

The competition of load cell technology in today's international market is concentrated in the competition of product accuracy, stability and reliability; the competition of manufacturing technology and manufacturing process; the competition of applying high-tech to develop new products and products with independent intellectual property rights. All load cell manufacturers are working hard to cultivate their own core competitive technologies and build core competitive products.

 

From the products exhibited at the International Weighing Instrument Industry Exhibition in recent years and the analysis of the products of many companies in the market leader position, it can be concluded that the common pursuit of these companies is: better elastomer materials; resistance strain gauge compensation components The technical requirements and environmental stress screening are stricter; the manufacturing process is more refined; the circuit compensation process is more perfect; the appearance quality is more perfect.

 

The accuracy, stability and reliability of load cells are important quality indicators, and they are also the most concerned issues for users. In this regard, these enterprises have carried out many researches and experiments in structural design, manufacturing process, circuit compensation and adjustment and stability treatment, and have made great progress.

 

2. What are the external factors for the inaccuracy of electronic crane scales?

Electronic crane scale is a weighing tool that completes digital reading through hook induction and sensor transmission. Most of the devices that rely on sensors to complete data transmission have requirements for the accuracy of the results, especially when measuring some heavy objects with strict accuracy requirements, the measurement accuracy will cause slight deviations due to various factors. Today SAINTBOND is here. Let's take a look at the external factors that cause the accuracy of the electronic hanging scale to be inaccurate.

 

The first is environmental factors. A humid environment may have a certain impact on the electronic crane scale. If the sensor is not treated with moisture-proof treatment, it is equivalent to an open state. When the air humidity is high, it is easy to corrode the interior, resulting in sensitivity missing, thus affecting the weighing results. Therefore, if it is not a professional waterproof wired crane scale, it must be used in a dry environment to ensure the weighing accuracy.

 

Then it is the reason of human operation or the interference of the surrounding environment. If the operation is not performed according to the standard operation action, it is likely to cause measurement errors, or operation without professional training. When the operator is operating, it will affect the accuracy of the data. At the same time, in the process of using it, we must pay attention not to have Digital & Crane scale with the same frequency around, which will cause interference on the signal, which will lead to the loss of measurement on the data. allow.

 

These are all external factors that cause the inaccuracy of the weighing measurement results of wireless crane scales. Therefore, SAINTBOND recommends that everyone pay attention when using digital crane scales and try to avoid these external factors.

 

3. How to zero and calibrate the SAINTBOND crane scale

The calibration of the weighing instrument is the calibration of the weighing instrument parameters. When the weighing instrument is packaged by SAINTBOND for the first time or any part of the weighing system is changed, and the calibration parameters of the current equipment cannot meet the user's requirements, the weighing instrument should be calibrated. The calibration parameters directly affect the weighing results of the weighing instrument. In order to prevent personnel from misoperation, the administrator and system administrator are required to log in to calibrate the weighing instrument. to log in to the corresponding user).

 

The national standard requires password protection for the calibration parameters of the weighing instrument, so you need to enter the correct password when entering the calibration parameters; to change the calibration password, click any parameter in the calibration interface of the weighing instrument, and click Modify the password in the pop-up box that appears. To change the calibration password, in the calibration interface, two calibration methods are provided: weight calibration and theoretical value calibration. The calibration steps are as follows:

 

1. Empty scale calibration:

Empty scale calibration means zero calibration of the weighing platform. There are two ways to perform zero calibration: automatic acquisition and manual input. When the new equipment or the weighing structure is adjusted, the "automatic acquisition" method must be used for zero calibration.

 

Automatic acquisition: successful calibration conditions: the weighing bucket is empty and the weighing platform is stable. After the weighing platform is emptied, the meter displays the current millivolts. Press [Empty Scale Calibration] to calibrate the current state to zero position.

 

Manual input: manually input the millivolt value corresponding to the zero point, click [empty scale input], and enter the recorded zero point voltage value in the pop-up box to calibrate the zero point. This voltage value is the recorded value of the data recorded when the weight is calibrated for manual input.

 

2. Weight calibration: The weight calibration function is a method of using weights in the field. Proceed as follows:

1. Select weighing parameters such as weighing instrument unit, decimal point, division value, etc. according to your needs;

 

2. For empty scale calibration, please refer to the empty scale calibration steps;

 

3. Put the weight on the weighing platform, and after the weighing platform is stable, click [Weight Calibration], enter the weight of the weight in the pop-up box, and click OK to complete the calibration of the weight.

 

3.Theoretical value calibration: 

Theoretical value calibration is to carry out the weight calibration operation of the weighing instrument by inputting the sensitivity of the connected sensor and the sensor range value. Proceed as follows:

 

Step 1: Select weighing parameters such as weighing instrument unit, decimal point, division value, etc. according to your needs;

 

Step 2: Click [Theoretical value calibration], and set the total range of the load cell in the pop-up box (if connecting multiple sensors, enter the sum of the total range of the sensor);

 

Step 3: Set the sensitivity of the load cell (such as connecting multiple sensors, input the average sensitivity);

 

Step 4: Turn on the "Theoretical value valid" switch, and the interface will display "Theoretical value calibration is valid".

 

4. Summary

The multi-function electronic scale is favored by the majority of users because of its good confidentiality, reliability, accuracy, advanced technology and simple structure. It is more and more widely used in commercial activities, which brings convenience to people's economic life. The single-chip microcomputer plays an important role in it, and its application will become more and more extensive.