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我厂于1965年底在减压装置试用了DDZ-Ⅰ型电动单元组合仪表;1968年在减粘装置试用了DDZ-Ⅱ型电动单元组合仪表。目前,在催化裂化,铂重整,扩建后的2~＃酮苯也全部运用了DDZ- Ⅱ型电动单元组合仪表;在两套常减压装置与直接数字控制机配套的变送器、记录仪和转换器也都选用了Ⅱ型电动系列表;另外,丙烷脱沥青装置用了进口Ⅱ型电动仪表。目前,全厂所用Ⅱ型电动仪表占仪表总数的2/3。
I plant in the end of 1965 in the decompression device trial DDZ-Ⅰ-type electric unit combination meter; 1968 in the viscosity-reducing device trial DDZ-Ⅱ electric unit combination meter. At present, in the catalytic cracking, platinum reforming, after the expansion of 2 ~ # ketone benzene also use DDZ- Ⅱ-type electric unit instrument; in two sets of atmospheric and vacuum distillation unit and direct digital control of the matching transmitter, record Instruments and converters are also selected Ⅱ type electric series table; In addition, propane deasphalting device used imported Ⅱ type electric instruments. At present, the whole plant used Ⅱ type electric instruments account for 2/3 of the total instrument.