测量值不准确
响应慢或无响应
显示故障代码
仪器无法启动或频繁重启
信号漂移
仪器显示 “低氧警报” 或 “高氧警报”
测量数值无规则漂移
测量数值不稳或反复摆动
检测器内有水雾、液滴或进油性、黏性物质
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