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齐齐哈尔市计量所,在毛主席“自力更生,艰苦奋斗”的方针指引下,自行设计制造成功了“DDJ—1型电子管电压表误差测量仪”,用以取代价值万元的苏修进口的 KB—2型电子管电压表校验装置。DDJ—1型仪器采用了自行研制的恒压补偿线路,比进口的 KB—2型仪器具有精度高,测量使用范围广,输出阻抗低等优点,并能机动的与上一级标准仪器进行校准,而达到与标准仪器同精度,正个仪器试制费用仅千余元。该仪器经东北区无线电计量协作组检定,
Qiqihar Metrology Institute, in Chairman Mao “self-reliance and arduous struggle” under the guidance of its own design and manufacture of a successful “DDJ-1-type tube voltmeter error meter” to replace the value of 10,000 yuan Soviet revision of imported KB- 2-type tube voltmeter calibration device. The DDJ-1 instrument adopts self-developed constant voltage compensation circuit. Compared with the imported KB-2 instrument, it has the advantages of high precision, wide measuring range, low output impedance and can be maneuvered with a standard instrument , And reached the same precision with the standard instrument, a trial of equipment is only a thousand dollars. The instrument by the northeast radio measurement collaborative team test,