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北京环境保护仪器厂生产的HG-3型火焰光度计具有分析速度快,灵敏度高,试样耗量小以及方便安全等优点。但是,由于本院所在地带供电电压波动过大常在150～270V之间,这样该仪器的电子打火及火焰监视电路使用的两块射极耦合触发器JEC-2极易损坏,而且该集成块又不易买到,影响医院检验科正常工作。为此我们经过反复试验,对该仪器的控制电路作了。改进,经两年多使用,该电路部分再没出现过故障。
HG-3 flame photometer produced by Beijing Environmental Protection Instrument Factory has the advantages of fast analysis, high sensitivity, small sample consumption and convenient and safe. However, the JEC-2, the two emitter-coupled flip-flops used in the electronic ignition and flame monitoring circuit of the instrument, is extremely vulnerable due to fluctuations in the supply voltage in the area of the institute, which is extremely large, and the integration Block is not easy to buy, affecting the normal work of the hospital laboratory. To this end we have repeatedly tested the control circuit of the instrument made. Improvement, after more than two years of use, the circuit part no longer appeared fault.