Influence of measurement steps and mode selection of direct reading spectrometer on accuracy of instrumental analysis

1、使用环境：放置光谱仪的实验室应该防震，洁净，通风干燥（如南京麒麟生产的QL-5800A型直读光谱分析仪的环境要求：温度23正负5之间，适度在15-70%之间），一般来说直读光谱仪的相对适度应该小于80%，室内温度应该保持在0—50度之间，在同一个校准周期内室内温度变化不超过5摄氏度。

1, use the environment: the laboratory of the spectrometer should be shockproof, clean, ventilated and dry (such as the environmental requirements of the QL-5800A type direct reading spectrometer produced by Nanjing Unicorn: temperature 23 positive and negative 5, moderate in 15-70%). Generally speaking, the relative moderation of the direct reading spectrometer should be less than 80%, and the indoor temperature should be kept at 0 Between 50 degrees, the indoor temperature change does not exceed 5 degrees Celsius in the same calibration cycle.

2、现场电源电压要求：QL-5800A型直读光谱分析仪的电源电压一定要是220V，千万不能用380V电压，因为HX-750型只是过流保护，没有过压保护，并且电压220V变化小于10%，频率50HZ，变化小于2%，并且一定要接地良好。

2, field power supply voltage requirements: the power supply voltage of QL-5800A direct reading spectrometer must be 220V, no 380V voltage, because HX-750 type is only over current protection, no overvoltage protection, and voltage 220V changes less than 10%, frequency 50HZ, change less than 2%, and one must be well grounded.

3、检查氩气瓶是否有氩气，并且必须是纯度99.99%以上的高纯氩气，氩气的纯度与流量对分析测量值有很大影响.检查氩气是否与主机，压力表正确链接，打开氩气阀，检查氩气压力是否在10bar以上。

3, check argon gas bottle whether there is argon, and must be high purity argon with purity of more than 99.99%. The purity and flow of argon will have a great influence on the analysis and measurement. Check whether argon gas is connected with the main engine, pressure gauge, open the argon valve and check if the argon pressure is on 10bar.

4、开机后，检查气压温度等条件是否满足仪器正常使用的要求。一般主机压力显示在5-5.5之间，温度在38正负1之间，一切正常时候就可以开始其他操作。

4. After opening the engine, check whether the conditions such as air pressure and temperature meet the requirements dimai.75ix.comhedao.75ix.com niuyang.75ix.comtongban.75ix.com lixinb.75ix.com daozhu.75ix.com of normal use of the instrument. The general mainframe pressure is displayed between 5-5.5 and the temperature is between 38 plus minus 1. All normal operations can start other operations.

5、在开机之后到可以测量的这段时间大约在10分钟左右，在等待过程中可以先进行式样打磨，试样打磨对于测量也很重要，如打磨偏细则测得碳含量偏低，如打磨偏粗则测得碳含量偏高，对于试样的打磨粗磨后，最好用40#的砂子细磨。同一点也不能进行2次激发，否则结果也有偏差。样品表面纹路清晰，无缩孔，无砂眼则可进行测量分析，打磨好的试样表面不可以有手触摸，这是人为操作误差中常见的误差，一定要严格按安全操作规程操作。

5, the time that can be measured after the start of about 10 minutes, in the process of waiting for the first pattern grinding, sample grinding for measurement is also very important, such as grinding deviation measured carbon content is low, if the grinding is coarse, the measurement of carbon content is high, for sample grinding rough grinding, the best use of 40# sand The son is fine grinding. No 2 excitation can be made at the same point, otherwise the result is also biased. The surface of the sample is clear, no shrinkage, no sand eye can be measured and analyzed. The surface of the good specimen can not be touched by hand. This is a common error in the artificial operation error. It must be operated strictly according to the safety operation regulations.

6、选择模式，根据所测量试样的材质不同，而采用其相应的模式，低合金钢，铬钢，铬镍钢等的模式并不相同，应选择适合材质的模式，这点也很重要，它直读光谱仪测量准确性的关键，简单的说，直读分析测量属于定性定量分析，所以它比其它定性半定量或者定量分析都要更加准确，这也是本文的核心—仪器分析中直读光谱仪的准确性更好。

6. Selection mode, according to the different material of the measured sample, and adopting its corresponding mode, the mode of low alloy steel, chrome steel, chromium nickel steel is different. It is important to choose the suitable material model. It is also important to read the accuracy of the spectrometer directly. In brief, the direct reading analysis is qualitative and quantitative. Analysis, so it is more accurate than other qualitative semi quantitative or quantitative analysis, which is also the core of this article - the accuracy of the direct reading spectrometer in the instrument analysis is better.

7、检验电极和激发装置是否清洁，用电极刷清洁电极和激发装置，电子表面钝化则需更换，然后用专业电极安装工具使其固定在正确位置（一般电极端部到分析面距离4mm）。

7. Whether the electrode and the excitation device are clean, the electrode and the excitation device are brushed with the electrode, the passivation of the electronic surface needs to be replaced, and then the special electrode installation tool is used to fix it in the correct position (the end of the general electrode to the analysis surface distance is 4mm).

8、用废样打点，直到打出的点符合3-6 mm金属光泽点要求后，用与被测样品相近的标准试样测量，若标样的测量值与标准值偏差小，就可以进行测量了，若偏差较大或不稳定，应对此标样做OPS，若OPS结果仍不理想，那就需要重新制作曲线了，知道问题解决为止。

8, use the waste sample to point the point, until the hit point meets the requirements of the 3-6 mm metal luster point, and is measured with the standard sample similar to the sample measured. If the measurement value of the sample is little deviate from the standard value, it can be measured. If the deviation is large or unstable, the sample should be OPS. If the OPS result is still not ideal, it needs to be renewed. Make the curve and know how to solve the problem.