我科1996年购置的CD－1700血液分析仪在近段使用时，曾出现一次“C0untoverrange”，白细胞不能计数的故障．现把我们处理过程简述如下，供同行参考．故障表现：在开机仪器自动进人背景测试后，显示背景良好．进行标本测试时，白细胞不能计数，直方团呈一条抛物线（如图1）．屏 When the CD-1700 Blood Analyzer purchased by our department in 1996 was used in the near segment, there was a “C0untoverrange” and the white blood cells could not count the failure. Now we briefly describe the process as follows for your reference. Failure performance: After the boot instrument automatically enters the background test, the display background is good. When the specimens were tested, white blood cells could not be counted, and the histogram showed a parabola (Figure 1). Screen