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1) European Union will unify and regulate various directives? Regulate WEEE, RoHS and EUP into a main directive? 2)Give detailed introduction of ecological design?
Answer： 1) European Union directive is a trade barrier based on technology, which only considers the executability of the companies inside European Union, not take executability outside European Union into consideration.
2) Please refer to EUP directive.
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The material is iron and steel, however, it judges as plastic and others. How about the identification rate of the instrument?
Answer： Hint is not 100% and it is the additional function. You just need to select the corresponding work curve according to the material.
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What about the range of the initialization count rate?
Answer： 2000-7000
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The count rate is low while testing plastic samples, so how about the accuracy after prolonging time?
Answer： As the count rate is low, better test result can be reached through prolonging time. Detailed accuracy is dependent on many factors, such as homogeneous material and surface roughness.
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How to check if it is the right collimator according to the spectrum?
Answer： If Lay the collimator in a wrong way while initializing, initialization may not reach 1105 channel, and the peak spectrum will be abnormal. The operators should be more familiar with characteristic spectrum of every curve.
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How about the peak channel when use Ag piece to pre-heat? What is the Ag content?
Answer： 1105; RoHS software is not applied in testing Ag. Just use the Ag to adjust the instrument. It is a tool for the instrument position, so do not consider the content.
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Too few samples (but the samples have covered the whole test window); how to improve?
Answer： On one hand, the count rate is too low, may be because the sample is too thin; you can put more layers to increase count rate. As to some work curves of the elements, Skyray engineers will be responsible for them. On the other hand, perhaps because the datum is not import after re-installing the software; just import the datum under the software catalogue. Generally, all samples should cover the whole window; the minimum thickness of polymer and light metal such as Al, Mg and Ti is 5mm; minimum thickness of liquid is 15mm; minimum thickness of other alloys is 1mm.
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What is the reason for displaying “material unidentified” in the process of testing? Why? How about the accuracy? How to judge?
Answer： Software is just an assistant tool for us to judge the sample; it is not subject to the software hint. Unidentified material hint relates to the complex material. The system cannot identify, so the operators can judge it. The accuracy depends on the reality of the sample. XRF is comparative analysis, and comparative testing.
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How to understand accuracy and precision?
Answer： Accuracy shows the difference between the testing data and the real value; precision is a standard for testing the stability for the instrument.
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How to make sure checking frequency and time of the standard sample? How to control the time for pre-heating?
Answer： Pre-heating: 15 to 30 minutes. Strictly, check every day.
