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In fact, a truly good electronic truck scale has more functions and a wider range of use. Therefore, we are very concerned about the quality of products when we purchase. So what indicators can reflect the quality of a car's loadometer?
An electronic truck scale that complies with national standards, its performance mainly includes: performance, temperature, damp heat, electromagnetic compatibility, anti-electromagnetic field radiation, power supply voltage change, tilt and so on. Here are the details of these tests:
1. The performance test of electronic truck scales should be carried out under stable ambient temperature conditions, generally normal room temperature, except in special circumstances. The stability of the ambient temperature means that the maximum temperature difference during the test does not exceed 1/5 of the regulated temperature limit of the scale and is not greater than 5°C; the temperature change rate does not exceed 5°C per hour.
2. The electronic truck scale temperature test is generally conducted at 20°C, 40°C, -10 (or 0)°C, 5°C and 20°C. The relative humidity during the test is 50%. The purpose of the temperature test is to ensure that the weighing scale is accurate and reliable under the rated conditions of use.
3. The high temperature of the electronic truck scale damp heat test is 40°C and the relative humidity is 85%. The purpose of these tests is to ensure that the loadometer can still guarantee the metering performance under different temperature conditions.
4. The main items of the electronic truck scale interference performance test tests are: electrostatic discharge, pulse train superposition, short-time power supply voltage reduction, and anti-electromagnetic field radiation. The test requires the scale to have a difference of the indication value not greater than one test division value under the interference and non-interference conditions described above, or the scale can measure and reflect the significant increase.
5, electronic truck scale voltage test voltage test 1500v, for the sine wave voltage. The test voltage should gradually rise to the specified value, hold at the specified voltage for 1 minute, and then smoothly drop to zero. In the pressure test of the platform scale, arcing or breakdown shall not occur.
6. Leakage current detection of electronic truck scales is also one of the safety performance tests. According to regulations, the scale shall have sufficient insulation under the rated conditions of use. The test sequentially measures the leakage current between each pole of the power supply and all accessible conductive elements that are connected together. Scales made of insulating materials shall be metal foils as specified in the "Insulation and pressure test".
7. The stability test of electronic truck scale shall be conducted at least 8 times in the whole type test, and this test shall be interspersed in the test of temperature, interference, safety performance, etc. The time interval of each test shall be from half a day to 10 days. In order to observe whether the weighing performance of the scale under different conditions meets the requirements. In order to make the results of each measurement possible, environmental conditions must be recorded during the test and necessary corrections must be made to the effects of temperature and pressure.
At present, there are many kinds of electronic truck scales on the market, and the prices are different. When consumers purchase truck scales, the most distressing problem is that they don't know what kind of electronic truck scales are most suitable for their own use.