According to the working principle of liquid level gauge and JJG 971-2019"Liquid level gauge"verifi-cation regulation,this paper takes advantage of the characteristics of liquid level in connecting pipe to maintain e-qual height,and uses laser interferometer as the main standard to develop a special verification device for liquid level gauge.At the same time,the corresponding verification method is put forward to trace the quantity value and evaluate the uncertainty of its indication error.The results show that the device is convenient to operate,has strong applicability,and can effectively improve the verification accuracy.
维普
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