How to reasonably select electronic weighing apparatus:

The convenient use of electronic weighing apparatus has been widely used in various industries. It not only has high-precision measurement, but also realizes multi-function and multi-purpose. At present, there are hundreds of domestic manufacturers of electronic weighing instruments, mainly non automatic weighing instruments and automatic weighing instruments. Electronic weighing apparatus has entered the period of self-development and design from the introduction of technology in the past, especially the development of weighing display controller for non automatic weighing apparatus has advanced by leaps and bounds. Weighing instruments are divided into automatic weighing instruments and non automatic weighing instruments, and non automatic weighing instruments are widely used in the market. It is mainly used in trade settlement, and it is also the electronic weighing instrument that the masses have the most contact with, such as electronic pricing scale, electronic platform scale and electronic truck scale, which are widely used; Automatic weighing instruments are usually used in batching scales and quantitative packaging scales in industrial and mining enterprises. The electronic weighing instrument is mainly composed of weighing display controller, weighing sensor and electrical control. The reasonable selection of weighing display controller and weighing sensor is the key to determine the quality of the factory products, which determines the accuracy, reliability, failure factor and other parameters of the scale. How to reasonably choose electronic weighing apparatus and weighing display controller is the most concerned problem of users.

1、 Selection of weighing instruments the accuracy grade of weighing instruments sold on the market at present is level (III), and the display division is generally 3000 divisions. The minimum division value varies from 1g to 50 kg according to the size of the scale. (for example, the minimum division value of 15 kg electronic pricing scale is 5g). When purchasing: take the electronic pricing scale of 15 kg as an example;

1. In the empty scale state and the maximum scale state, the numbers are stable (without blinking);

2. Place one-third of the maximum weight (or something close to this value) on the scale surface within the range of 1/4 (divide the scale surface into 4 parts equally) to test whether the numbers of each point are consistent;

3. If possible, take the standard weight with the maximum weight and put it on the scale table to test its accuracy;

4. Take the standard weight close to the maximum weight (or the weight close to this value) and load it repeatedly for 3 times to test whether the numbers are consistent;

5. Press each function key to test whether the function keys are in good contact and whether the purpose is achieved;

2、 Selection of weighing display controller

1. The types of instruments are divided according to their functions: single function, multi-function and special instruments. Such as Shanghai sigang, Yaohua, three points; Changzhou Toledo; The product quality of several weighing display controller manufacturers such as Hangzhou Keli has been qualified for two consecutive years and the quality is relatively stable through national supervision and random inspection; The birth of new products marks the growing capacity of domestic production of weighing display controllers, with high starting point and strong functions. According to the characteristics of the sensor output signal, it can be equipped with either analog output signal sensor or digital output signal sensor. In addition, it also has pricing function, with one meter for multiple purposes. The single function instruments in its series include a1--- metering type, a2--- counting type, etc.

2. Advantages and disadvantages of multifunctional instrument and single function instrument multifunctional instrument: it has strong adaptability and can be widely used in various non automatic electronic weighing instruments and automatic electronic weighing instruments. However, the software development cycle is long and the hardware support cost is high, so its manufacturing cost is high. Single function instrument: short software development cycle and less hardware, so its manufacturing cost is low. Special instruments; The manufacturing cost is between single function and multi-function. In terms of the use failure rate, the multi-function is higher by comparison.

3. Considerations for Selecting Instruments

a. Choose which kind of instrument should be based on actual needs, rather than choosing the more functions, the better;

b. Select the products that have obtained the production license of measuring instruments;

c. All technical indicators meet the national standard of weighing display controller;

d. It is important to assess whether it meets the safety protection requirements;

4. International and domestic weighing display controller dynamics at present, the instruments developed and produced in China generally have only one meter for one scale, while the instruments produced abroad can have multiple scales for one meter at the same time. Its software functions and hardware support can be shared, which relatively reduces the manufacturing cost and management expenses in use.

5. Precautions when developing new instruments, attention should be paid to the reliability of safety performance. Its technical requirements and Metrology should meet the requirements of the main provisions of oiml76 international recommendation document, especially in terms of anti-interference. This is a general optional inspection, but it can reflect the standardization of the technical performance and functional requirements of the display.

6. Maintenance and care. Correct use and timely maintenance are the key to prolong the service life of the equipment. The measuring instruments must be used in the specified environment. In order to avoid innocent damage to the equipment, the operating instructions and technical instructions must be read carefully before operation, and can be used only after confirmation.