Is the accuracy of the belt scale high, the accuracy level of the electronic belt scale

Now the technology of belt scales has been very mature, and many companies can produce them, such as Tianjin Century Huixin's machines, which can do up to positive and negative.

There are many reasons that affect the accuracy of belt scales, do not use steel ribbons for conveyor belts, environmental influences, machining accuracy of belt scales in the early stage, the location of the scale body, and whether the rigidity of the conveyor frame needs to be reinforced? Does the trunnion have a response? Are the connecting reeds deformed?

Is there a tie wire leveling in the weighing scale body area? Does the roller have radial runout? Is the conveyor frame tensioner in place?

The speed measurement, the linearity of the load cell, the sensitivity and the AD accuracy of the weighing instrument and so on all the errors add up to the overall error of the belt scale. After the standard installation, the belt length and the verification chain code are in the later stage, and the foundation is not good like building a house, and everything is in vain. If you don't go to the site to check it out in person, it's unreliable to just replace one aspect of something.

Xuzhou Sanyuan Automated Weighing Division is affiliated to Xuzhou Sanyuan Company, which has decades of experience in guiding installation and commissioning, and has troubled thousands of belt scales and weighing feeders, covering hundreds of enterprises such as power plants, metallurgy, chemical industry, ports, paper mills, coal mines, etc. It has created a group of service personnel with strong ability, excellent technology and high quality. In order to adapt to the company's development and maintain long-term technical exchanges with customers, the automated weighing division was established.

We promise that no matter which metering equipment finds us, we will do our best to ensure that the conveyor runs worry-free and the belt scale accurately measured.

According to the current international recommendations (OIML R50:1996), the national metrology verification regulations (JJG195-2002), the national standard (GB T 7721-2007), the electronic belt scale is graded, level 1, level 2 three accuracy levels, that is, the dynamic cumulative error of automatic weighing materials is required to be not greater than in use; The allowable error of the initial verification and subsequent verification is half of the above-mentioned indicators, that is, they are not greater than. In other words, the accuracy of a scale should be equivalent to the long-term allowable error.

Users should have a clear understanding of this, because some belt scale manufacturers intentionally or unintentionally confuse the two, and use the indicators required by the verification to pass off the accuracy level; What's more, the performance of the belt scale is very susceptible to the impact of the environment and working conditions, so only the belt scale with excellent durability can reliably and stably maintain the corresponding performance requirements of its accuracy level for a long time, and it is not just the calibration data at the time of delivery.

At present, there are belt scales with higher accuracy in China. For a grade of belt scale, the index should be maintained for a long time, and the error of verification is not greater. As for the so-called belt scale, it stands to reason that the maximum allowable error during its reliable service life should not exceed (this indicator is better than the common Class III non-automatic scale, how much confidence is there?!).

For high-precision belt scales, please choose Chengde Guangfeng.

<> "Hello dear, I'm glad for your question How to adjust the belt scale to weigh the high and simple hunger first, we can calibrate the zero point in the case of the belt idling, it is best to do it twice, and then we can observe whether the cumulative weight of the return is still decreasing, it has been decreasing, if sometimes it decreases and sometimes it increases, but the total number remains the same, then it is no problem, if it still keeps decreasing, then we need to separate the sensors. The output of the millivolt gear sensor with a multimeter alone, the output of the correct sensor is generally 0-20mv, how not in this range or the output is zero. You can conclude that the sensor is broken and replace the sensor.

Then you first have to know how to calibrate the belt scale, and I don't know if you are using the instrument of our Xuzhou Sanyuan belt scale. Take Xuzhou Sanyuan SY2105 meter as an example:

We can think of a belt scale as a bench scale or pole scale waiting to be calibrated.

Automatic zero calibration (tare), this step can visually see whether there is material passing on the belt scale, you know.

Automatic interval calibration (scale star), this step can be seen as the calibration of the scale star.

For example, if I want to calibrate the bar scale, I put 10kg of weight in the tray, where should the scale be placed to balance? The rod scale is high, and the people who buy vegetables are unwilling, and the rod scale is low, and the vegetable sellers don't agree. After the scales are placed, the scales are assigned in equal proportions.

In this way, the scale of 5kg and 1kg is available. Interval calibration is commonly known as scale star calibration. In the case of load cell stress, the correlation between the variable MV value and the load on the belt is fed.

It is equivalent to the change in the MV value caused by the force through the interval value.

For example, when a belt is loaded with 30 kg of material, the load cell is subjected to a force change of 3 mV. Then we can say that when the change is 1MV, the force is 10kg m. In this way, the capacity of the load cell is distributed linearly and proportionally.

It's the same as the scale of the rod scale star.

The interval value is the basis for the change of the weight of the load and the MV value of the load cell, for example, the material change of 30kg m is 1234, if the artificial modification interval value becomes 2468 magnification, it is equivalent to you double the change of MV, then the material is 60kg m. The traffic is doubled. The interval value and the flow rate are directly proportional.

In fact, the weight of the material is still the same. A lot of people don't understand the relationship. Knowing that it is true, Xuzhou Sanyuan Tuopu Electric Technical Service Department is subordinate to Xuzhou Sanyuan Company, with decades of experience in installation and service commissioning, we ensure the worry-free operation of the conveyor, and the accurate measurement of the belt scale, welcome to call for technical exchanges.

According to the regulations, the electronic belt scale is set up with three accuracy levels, level 1 and level 2, that is, the dynamic cumulative error of automatic weighing of materials is not greater than when it is required to be inspected in use. Now that technology is developing, many electronic belt scales have improved the accuracy by one layer, likeSuzhou Guonuo Information TechnologyThe high-precision electronic belt scale developed and produced can achieve accuracy and can be kept stable in use.

Electronic belt scale in the actual use of many factors affected by the factors, in addition to its own performance can achieve the accuracy, the installation of reasonable specifications on the subsequent use of the accuracy of the great impact, it is best to have a professional engineer to install. LikeGuonuo Information TechnologyThere are special engineers to install the door to ensure that the actual use accuracy of the electronic belt scale can reach its own accuracy.

Xuzhou Sanyuan Automated Weighing Division will answer for you:

The electronic belt scale is only used as a meter, basically just a meter to display data.

The batching scale is actually a small conveyor with an electronic belt scale installed on it, so that the constant flow rate can be discharged. There is a control system, and the instrument should control the function of the inverter speed regulation.

The distributed batching system is to combine several batching scales together, and each batching scale sets a flow rate separately for percentage proportioning. Compound fertilizers, coking plants, cement plants, tobacco, chemical plants, desulfurization systems of power plants, etc. all have the presence of batching scales.

Let's take the batching scale of the towing operation mode as an example: (the silo is directly pressed on the belt of the batching feeder, and there are pros and cons to this batching method, which we will talk about later).

Instantaneous flow = kilograms per meter of material Belt speed 3600 1000

The discharge port is basically unchanged when the material is dragged. By adjusting the speed of the belt, the amount of material can be controlled.

In order to achieve a good batching effect, in addition to the requirements of each batching scale, there are also PID adjustment, frequency converter acceleration and deceleration time, size adjustment of the discharge port, the accuracy of the weighing instrument, including the time of system response, rapid feeding when the material is broken, and one of my most commonly used methods. It is to record the change of frequency converter frequency of each batching scale during operation. These are the differences between a batching scale and a belt scale.

The way and method used are not the same.

The electronic belt scale is a kind of equipment similar to a belt conveyor, but there is a pressure sensor under the belt, which transmits the signal to the single-chip microcomputer, and displays it in digital form after processing by the single-chip microcomputer, with instantaneous flow and cumulative flow. The motor of the belt conveyor is a variable frequency motor, which can change the feeding speed through frequency conversion.

Suzhou Guonuo Information TechnologyThe high-precision electronic belt scale developed and produced can reach the highest precision and can be stable, which can meet the high-precision measurement requirements of the industry.

However, for the electronic belt scale, high precision not only refers to the accuracy that its own performance quality can achieve, the installation of the electronic belt scale is equally important, only the correct scientific and reasonable installation, in order to ensure that the electronic belt scale can achieve its own performance in the subsequent use process. Guonuo Information Technology provides door-to-door installation services, which are installed by experienced technical engineers and provide guidance to ensure that the electronic belt scale can be installed correctly, ensure the accuracy and stability of subsequent use, and improve the after-sales service, and solve the problem quickly and timely.

In addition, domestic high-precision electronic belt scale manufacturers also have Xuzhou Shengneng Technology and Xuzhou Haonuo Automation Technology, which produce high-precision electronic belt scales with high precision and excellent service.

The weighing belt scale is used for belt conveyors, which can realize the continuous weighing of the materials conveyed by the belt conveyor, and the electronic belt scale is such a measuring equipment. Regarding the accuracy of the weighing belt scale, it is important to meet the actual needs of the site, including measurement accuracy, angle, bandwidth, etc., the accuracy is not necessarily the higher the better, the more accurate the more expensive, according to the actual needs to determine.

If you must need a high-precision electronic belt scale, the highest precision can be achieved by Suzhou Guonuo Information Technology, and it can be kept stable, which can meet the needs of high-precision industries such as settlement. In addition, Xuzhou Shengneng Technology and Xuzhou Haonuo Automation Technology can also achieve such a high accuracy, which are manufacturers that can produce high-precision weighing belt scales.

Electronic leather cover with scale is a kind of dynamic continuous metering equipment for bulk materials, which is mainly widely used in industrial production, so its accuracy requirements are relatively high. Therefore, it is necessary to understand the measures to improve the accuracy and stability of electronic belt scales.

2. Speed sensor: The speed sensor is a sensor without edge effect, and the photoelectric sensor is better and can prevent interference.

3. Weighing rack: The weighing frame of the electronic belt scale should be selected as far as possible with a long weighing section, stable and linear force transmission, which should be leveled as much as possible during installation and cleaned frequently when in use, so as not to affect the tare weight change by collecting ash.

4. Idlers: Try to choose idlers with flexible rotation and small runout, and each group of idlers should be as uniform as possible.

5. Belt: The thickness and width of the belt should be as uniform as possible, and the joint should not be made of metal joints to reduce the change of tare weight.

6. Signal circuit: The signal line of the load cell and speed sensor of the electronic belt scale should be shielded with a cable to reduce the interference of the cover height shot.

7. Secondary instrument: The electronic belt scale instrument should be selected as an instrument with LED display or glow tube display.