How to choose the suitable electronic crane scale

An electronic crane scale is a tool for measuring weight, so named because it is generally used suspended from a drape. Electronic crane scales generally consist of a mechanical load-bearing mechanism, load cell, A/D converter board, power supply, wireless transmitter-receiver device and weighing display instrument. So how do we choose? Generally speaking, we should pay attention to the following aspects when choosing an electronic crane scale: accuracy, measuring range, function, versatility, etc. Here’s the introduction. First, the model of electronic crane scale
The models of electronic crane scale include two kinds, one is wireless digital transmission electronic crane scale, and the other is direct-view electronic crane scale.
Second, the composition and structure of electronic crane scale
Electronic crane scale generally consists of mechanical load bearing mechanism, load cell, A/D converter board, power supply, wireless transmitting and receiving device and weighing display instrument.
1、Wireless digital transmission electronic crane scale composition
Wireless digital transmission electronic crane scale consists of scale body and instrumentation, the scale body contains a mechanical load-bearing mechanism, sensors, A/D boards, wireless transmitter, power supply and shell, which mechanical load-bearing mechanism includes the unloading buckle, hooks and pins. In addition, in order to ensure the safety and reliability of the system there are sensor protection devices.
2, the composition of direct-view electronic crane scale
Direct-view electronic crane scale and wireless digital transmission electronic crane scale, compared with the biggest feature is the instrumentation function is directly embedded in the scale body, through the digital display on the scale body to reflect the weighing value.
Third, how to choose the electronic crane scale
1, the choice of accuracy
As a measuring instrument, the first question is accurate, so in the choice of electronic scales, the first question is to consider the accuracy of electronic scales to meet the requirements of the actual work of the unit, can not reach the national standard requirements of the scale. Generally speaking, as long as the accuracy can meet the requirements of the unit can be, is not too high the pursuit of high accuracy, accuracy is too high electronic crane scale, its working condition requirements are more demanding, the price is also higher.
2, the choice of function
With the popularity of electronic sensor technology and computer network management, a variety of measurement and control devices came into being, in order to facilitate the microcomputer management, hope that a variety of sensor output signals as consistent as possible in order to reduce the intermediate links, the current use of more interface signals for the standard RS-232 port and the 20mA current loop signal. The general function of the electronic scale is set as follows: tare (zero), add (subtract) by category, store the car number, tare, print, communication, overload alarm, change the receiving channel, set the password and so on.
3, Selection of weighing range
In the choice of weighing range, the most easily overlooked is the minimum weighing range, the range of electronic scales too large for small weighing, although it can also reach the national accuracy of the specified range, but the relative error becomes larger. In addition to consider the electronic scale and crane supporting issues, especially the electronic crane scale ring, hook is appropriate, to carefully read the manufacturer’s samples, if necessary, can be specially proposed in advance. Of course, do not let the electronic crane scale overload work is also very important.
4, adaptability and safety selection
Users should put forward requirements according to their own working environment, from the perspective of the non-ferrous industry, for raw materials into the factory, finished product sales of electronic crane scales using the normal type can be used for electrolysis workshop, we should consider the anti-magnetic, heat insulation, insulation problems, some occasions also need to consider the waterproof, moisture-proof, explosion-proof and so on, but the impact of the accuracy of the crane scale sensors are generally 150% of the overload force, too large overload, although it will not occur Safety issues, but will affect the accuracy of electronic scales.
5, the choice of general interchangeability
Usually, a unit of electronic crane scales and other forms of electronic scales are more than one, the general interchangeability between products, accessories, general interchangeability, is particularly important. As we all know, large to car scales, rail scales, electronic platform scales, small to price scales, weighing scales, counting scales and electronic balances, are not to take the resistance strain sensor as a sensitive element, even the scale manufacturers, metrology department with the force measuring machine are also used resistance strain sensors, so that it is very easy to achieve the network management, a great convenience to the user, but also reduces the use of maintenance costs.
6, After-sales service guarantee
A good product is inevitable in the use of the process does not occur a failure, when the problem occurs, they can quickly exclude, manufacturers can provide timely service, which is a very important aspect of product selection considerations. A good product should be designed to take into account the ease of maintenance, generally modular design, and easy to replace, when problems occur, there should be a prompt logo, easy to determine the cause of the failure, they can not solve the problem, the manufacturer should be able to provide timely service.
7, the economic benefits
The use of electronic crane scales of economic efficiency issues include three aspects, one is the price of the purchase, to compare the performance-price ratio, not excessive pursuit of high prices, low prices; the second is the need to use electronic crane scales, whether it can reduce the operational links, save space, reduce costs and improve product quality and bring benefits; the third is the electronic scales of the accessories and consumable materials are common, whether the long-term guarantee, and the price can not be too expensive. too expensive. The combination of these factors is the reference basis for considering economic benefits and decision-making.