How choose a weighing instrument

The convenient use of electronic weighing instruments has spread throughout various industries and has been widely used. 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. The weighing instruments are divided into two categories: automatic weighing instruments and non-automatic weighing instruments, while non-automatic weighing instruments are commonly used in the market. It is mainly used for trade settlement, and it is also the electronic weighing instrument that the masses have the most contact with, such as the commonly used electronic pricing scales, electronic platform scales and electronic truck scales; automatic weighing instruments are generally more common in industrial and mining enterprises. Batching scales, quantitative packaging scales, etc. Electronic weighing instrument is mainly composed of weighing display controller, weighing sensor and electrical control. Parameters such as the accuracy, reliability and failure factor of the scale. How to reasonably choose electronic weighing instruments and weighing display controllers is the most concerned issue for users. 1. Purchase of electronic weighing instruments: The accuracy level of weighing instruments currently on the market is (III) scales, and the display division is generally 3000 divisions. (For example, a 15 kg electronic pricing scale has a minimum division value of 5g) When purchasing: Take a 15 kg electronic pricing scale as an example; 1. The numbers are displayed stably in the empty scale state and the maximum weighing state (Do not blink); 2. Use one-third of the maximum weighing weight (or a weight close to this value) to place it within 1/4 of the scale table (divide the scale table into 4 equal parts) to test whether the number of each point is Consistent; 3. If possible, take the standard weight with the maximum weighing capacity and place it on the scale table to test its accuracy; 4. Take the standard weight close to the maximum weighing capacity (or a weight close to this value) and load it 3 times, and test each 5. Press each function key to test whether each function key is in good contact and whether it achieves its purpose; Multifunctional and dedicated meters. Such as Yaohua, Sanyi, Teraoka; the product quality of several weighing display controller manufacturers has been checked by the state and has been qualified for two consecutive years, and the quality is relatively stable; the birth of new products marks the domestic production of weighing display controllers. The ability is increasingly strong, the starting point is high, and the function is strong. According to the characteristics of the sensor output signal, it can be connected to a sensor with an analog output signal or a sensor with a digital output signal. In addition, it has a pricing function, which has a multi-purpose meter. The single-function instruments in its series include A1---metering type, A2---counting type and so on. 2. Advantages and disadvantages of multi-function instrument and single-function instrument: Multi-function instrument: It has strong adaptability and can be widely used in various non-automatic electronic weighing instruments and automatic electronic weighing instruments. But the software development cycle is long and the hardware support cost is high, so its manufacturing cost is high. Single-function instrument: The software development cycle is short and the hardware is less, so its manufacturing cost is lower. Dedicated Meters: Manufacturing costs are between single-function and multi-function. In terms of use failure rate, the multi-function is higher in comparison. 3. Issues to be considered when choosing an instrument: a. The choice of which type of instrument should be based on actual needs, rather than selecting as many functions as possible; b. Selecting products that have obtained a production license for measuring instruments; c. All technical indicators are in line with The national standard of weighing display controller; d. The key point is to check whether it meets the safety protection requirements; 4. Dynamics of international and domestic weighing display controller: the instruments currently developed and produced in China are generally only equipped with one meter per scale, while those produced in foreign countries The instrument can be equipped with multiple scales at the same time. Its software functions and hardware support can be shared, which relatively reduces manufacturing costs and management costs in use. 5. Matters needing attention: When developing a new instrument, pay attention to the reliability of safety performance, and its technical requirements and metrology should meet the requirements of the main provisions in the OIML76 international recommendation document, especially in anti-interference. This is a general optional inspection, but it can reflect the technical performance of the display and the normative requirements of various functions. 6. Maintenance and maintenance: Correct use and timely maintenance are the keys to prolonging 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 user manual and technical instructions must be thoroughly read before operation. It can be used only after it is correct.