由西德PLASTOMED公司制造的HTL－206型pH／血气分析仪在使用过程中PO2、PCO2一点及二点定标困难，仪器常显示CCPC“9999”CCPO“9999”CSPC“9999”CSPO“9999”而无法定标。此故障的出现一般有四种情况，现将异常情况及排除方法介绍如下：1电极腔漏液任何一电极腔漏液都会使定 The HTL-206 pH/blood gas analyzer manufactured by PLASTOMED of West Germany is difficult to calibrate at one point and two points during the use of PO2 and PCO2. The instrument often displays CCPC “9999” CCPO “9999” CSPC “9999” CSPO “9999” It cannot be calibrated. The emergence of this failure generally has four conditions, now the abnormal situation and exclusion methods are introduced as follows: 1 Leakage of the electrode chamber Any one electrode cavity leakage will be determined