Accuracy and precision have distinct meanings. Generally, accuracy refers to the ability of an analytical device to provide a measurement that is within a defined error from an established, true, and verifiable value. Precision is a measure of the recurrence of a value whether it is accurate or not. Two types of precision can be described: repeatability and reproducibility. In terms of particle size measurement, repeatability refers to the ability of an instrument to repeat its own measurement while the same sample resides in the circulating system. Reproducibility, on the other hand, is related to the comparison of two or more instruments in which representative samples are introduced to each of the instruments. Repeatability is statistically more variation-free than reproducibility because a single instrument measures the same recirculating sample when fluid suspended particles are measured. 準(zhǔn)確度和精密度是兩種不同的概念通常地，準(zhǔn)確度是指分析儀器提供在一定誤差測(cè)量范圍內(nèi)的準(zhǔn)確性，而精密度是對(duì)數(shù)值的準(zhǔn)確性的重復(fù)測(cè)量精密度的兩種類(lèi)型可描述為：重復(fù)性和重現(xiàn)性 對(duì)于粒度測(cè)量，重復(fù)性是指在分析儀器的循環(huán)系統(tǒng)內(nèi)的樣品不斷地重復(fù)同一種測(cè)量方法，另一方面，重現(xiàn)性是指兩種或多種分析方法對(duì)樣品的測(cè)量結(jié)果的比較從統(tǒng)計(jì)學(xué)來(lái)說(shuō)，對(duì)于一種分析方法測(cè)量懸浮液顆粒樣品時(shí)，重復(fù)性比重現(xiàn)性更可變 麥奇克ZxinS3500系列激光粒度分析儀