"When we sent several duplicate oil samples to our oil analysis lab, the particle counts were quite different. Some differed by as much as five in the ISO code. The samples taken after the 7-micron absolute filters were higher than the before samples. How can you determine what the real particle count is so you can make the best decisions?"

“当我们把几份重复的油样品送到我们的油分析实验室时，粒子计数有很大的不同。有些计数在ISO代码中相差多达5个。7微米绝对过滤器后来采集的样品粒子数高于之前的样品。你如何确定真正的粒子数是多少，这样你才能做出最好的决定呢？”

Many variables can affect particle counts in oil analysis results. If you test oil in a machine that has just had an oil change or top-up, the particles in the sample will be diluted, producing false data. Likewise, collecting an oil sample when the machine has been down for more than 10 minutes can result in incorrect data, as the large particles will have already begun falling out of the oil and into the sump.

许多变量可以影响油分析结果中的粒子计数。如果你在刚刚换油或加油的机器中测试油，样品中的颗粒将被稀释，产生错误的数据。同样地，当机器停机超过10分钟时，收集油样可能会导致不正确的数据，因为大颗粒已经开始从油中落入油箱。

To obtain an accurate picture of the lubricant's health as well as what is occurring in the machine, you should only take samples before the filters. Sampling after the filter only offers an indication of how efficient the filter is performing. Waiting too long to replace your filters or changing them before they are in bypass mode can dump contaminants back into the oil, causing particle counts to skyrocket. These free particles can also wreak havoc on machine surfaces.

为了能准确地了解润滑油的健康状况以及在机器中发生的情况，您应该只需要在过滤器前采集样品。过滤器后的取样只提供了过滤器执行效率的指示。等待过长时间才能更换过滤器，可能会将污染物倾倒回油中，导致颗粒数量激增。这些自由粒子也会对机器表面造成严重破坏。

For good, reliable data from your oil analysis program, you must be consistent in how oil samples are collected. Make sure you sample from the same point at the same time using the same method every time. The sampling equipment should be clean and dry, and the sample bottles should not be opened until absolutely necessary.

为了获得来自油分析程序的良好、可靠的数据，采集油样本的方式必须保持一致。确保每次使用相同的方法同时从同一点进行取样。取样设备应清洁、干燥，在绝对必要时不得打开样品瓶。

Before you take a sample, clean the machine's sample ports with a lint-free cloth. It is also a good idea to use a new zip-lock plastic bag to open and close the sample bottle. This will help keep environmental dust and moisture out of the sample. Remember, if you don't control what is going into the sample bottle, you will never have dependable results.

在采集样品之前，用无衬布清洁机器的样品端口。使用一个新的拉链锁塑料袋来打开和封锁样品瓶也是一个好主意。这将有助于防止环境中的灰尘和水分污染。记住，如果您不能控制进入样品瓶中的内容物，您将永远得不到可靠的结果。

If you send out samples to be tested, you must be able to trust the data you receive from the laboratory. Having a reliable testing facility is just as important as taking samples in the field. If the facility is nearby, make a surprise visit to see how samples are processed and how clean the facility is. If the lab is not handling samples correctly, the test results will be distorted, and you will get false positive data.

如果您发送要进行测试的样本，您必须能够信任从实验室收到的数据。拥有一个可靠的测试设备和在现场取样一样重要。如果设备在附近，去看看样品是如何处理的，以及设备有多清洁。如果实验室不能正确处理样品，测试结果将被扭曲，您将得到假阳性数据。

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