The writer of this paper proposes different views,he thinks that the sensitivity of chromatographic analysis has no relation with oil producing area,but has relation with the minimum test concentration or test error of component set in analysis instrume.

The paper introduces the structure and work principle of capacitance potential transformer in detail,and expounds the error test method of 330 kV capacitance potential transformer using series resonance circuit.

CVT has been broadly applied in electric power system,and the error test on CVT has been progressively increased,the paper mainly introduces reactance value selection method during the field CVT error test according to series resonance character.

The paper mainly introduces the structure and working principle of capacitance potential transformer,as well as the error test of 750kV capacitance potential transformer using series resonance circuit.

In this paper, by researching and analyzing the testing error in the structural pseudodynamic test, based on the civil engineering structural pseudodynamic test methods and automatic control theories, the testing of displacement interaction have been conducted on the specimen of MDOF (multi-degrees-of-freedom) reinforced .