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英国Coulter2F血球计数器是国内使用较多的一种常规检验仪器。该机电路并不复杂,但因缺少图纸资料,给用户维修带来一定困难。我院一台仪器在使用过程中,突然发生单边不计数故障,即孔电流极性指示灯燃亮及反转正常,但当pos灯亮时,仪器不计数。勉强使用了一段时间,不仅工作效率降低了一半,而且计数稳定性越来越差,最终导致完全无法正常使用。该机电极供电及测量时序控制电路在一块印刷板上,电路如下图所示,是我们对照实物测绘出来的。
British Coulter2F blood cell counter is a more routine use of domestic testing equipment. The circuit is not complicated, but due to the lack of drawings and materials, to bring some difficulties to the user maintenance. In the course of using an instrument in our hospital, a unilateral un-counted failure suddenly occurred, that is, the hole current polarity indicator lit and reversed normally, but when the pos light is on, the instrument does not count. Reluctant to use for some time, not only reduced work efficiency in half, and the count stability is getting worse and worse, eventually leading to totally unusable. The machine electrode power supply and measurement timing control circuit in a printed circuit board, the circuit shown below, is our physical mapping out.