The advantages of the instrument are:lower in cost; smaller in volume and suitable precision, and it can be used in workshops.
该圆度仪具有成本低廉、体积小、精度适宜、可在车间生产条件下使用等优点，具有一定的实用价值。
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We use PDA and MCS51 single chip computer, and this method not only greatly reduced the volume and weight of the instrument and made it easy for portable use.
This paper discusses the errors in verification system of small volume measurement instrument, and gives a detailed analysis on the test ways of small capacity measuring instruments.