中佳公司生产的ＧＣ— 12 0 0自动γ计数器在全国各大中型医院有较高的市场占有率。现将遇到的一例比较罕见故障的检修情况介绍如下。故障现象 :我院自 1997年引进一台双探头ＧＣ— 12 0 0自动Ｙ计数器以来 ,工作一直比较正常。最近 ,在检测记数过程中 ,曲线总是拟合不成功 ,表 The GC-1200 automatic gamma counter produced by Zhongjia Company has a relatively high market share in major and medium-sized hospitals throughout the country. An example of a relatively rare fault repair will be encountered as follows. Fault phenomenon: Since our institute introduced a dual-probe GC-1200 automatic Y counter in 1997, the work has been relatively normal. Recently, the curve was always unsuccessful in the process of checking the count.