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一、磁秤的两次读数 以前,磁秤在一点上照例是读四次数,而在长期工作中知道,在正常的情况下,第三、四次读数和第一、二次读数相差不大,于是我们由四次读数改成了两次读数。 四次读数是为了检查仪器的同向差、和水平泡的位置。检查读数是否正确,保证测量的精度,在改为二次读数之前,我们曾作试验,证明二次读数完全能达到所要求的精度(均方
First, the magnetic balance of the two readings Previously, the magnetic scale at one point, as usual, read four times, but in the long-term work to know that under normal circumstances, the third and fourth readings and the first and second readings are not much difference , So we changed from four readings into two readings. Four readings are used to check the difference in direction of the instrument, and the location of the horizontal bubble. Check the reading is correct, to ensure the accuracy of the measurement, before reading to the second reading, we have conducted tests to prove that the second reading can achieve the required accuracy (mean square