XWC 型、XQC 型仪表在化工厂使用较广、在几年的维护工作中,我们发现它的机械部分维修量较大,特别是切换打印机构磨损后较难修复,因此换件量大。针对这种情况,利用手头现有的元件,并配用热敏记录纸,试制了电子切换热敏记录电路,安装在XWC—300仪表上,经一年多运行,效果很好。 XWC type, XQC type instrument widely used in chemical plants, in a few years of maintenance work, we found that the mechanical part of its large amount of maintenance, in particular, switch the printing mechanism wear and tear more difficult to repair, so the replacement of a large amount. In view of this situation, the use of existing components on hand and with thermal recording paper, trial production of electronic switching thermal recording circuit installed in the XWC-300 instrument, after more than a year run, the effect is very good.