心电图机常见故障维修诊断

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                    <section data-role="outer" label="Powered by gulangu"><section><p><p><img src="image/20200927/38f59827ba9d9357ae8075aaac0005a3_1.png" /></p></p><p><p><img src="image/20200927/3c235a55190b117b891c3a477bc79a08_2.jpg" /></p></p><p><br  /></p></section><section data-tools="gulangu" data-id="89203"><section><section data-brushtype="text" data-width="100%"><strong>一、检验心电图机</strong></section><section data-width="100%"></section></section></section><p><br  /></p><p><span>1．其应用部分与各可触及的导电部件绝缘的检验。</span></p><p><span>2．对心脏除颤器放电作用的防护的检验。</span></p><p><span>3．故障状态造成的过热和机械损害的环境试验。</span></p><p><span>4．工作数据的准确性和对防止不正确输出的检验。</span></p><p><span>5．接地和电场的检验。</span></p><p><span>6．连续漏电流和患者辅助电流的检验。</span></p><section data-tools="gulangu" data-id="89203"><section><section data-brushtype="text" data-width="100%"><strong>二、心电图机常见故障</strong></section><section data-width="100%"></section></section></section><p><br  /></p><p><span>临床工作中，心电图机出现故障的主要原因有两个方面：</span></p><p><span>①操作不当造成仪器故障甚至损坏；</span></p><p><span>②其他原因及仪器老化。</span></p><p><br  /></p><p><em><strong><span>常见故障如下：</span></strong></em></p><section data-tools="gulangu" data-id="89226"><section><section data-brushtype="text">1．通电后电源指示灯不亮</section><section><section></section><section></section></section></section></section><p><br  /></p><p><span><em><span>可能原因：</span></em></span></p><p><span>①电源线接头及电源插头接触不良或损坏；</span></p><p><span>⑦线路断裂及电源开关损坏；</span></p><p><span>⑨指示灯本身损坏；</span></p><p><span>④电源变压器初放器有断路；</span></p><p><span>⑤电源保险丝烧断等。针对原因排除故障。</span></p><section data-tools="gulangu" data-id="89226"><section><section data-brushtype="text">2．保险丝烧断或仪器冒烟或出现烧焦味</section><section><section></section><section></section></section></section></section><p><br  /></p><p><span><em><span>可能原因：</span></em></span></p><p><span>①电源线或电源插头碰连或短路；</span></p><p><span>②变压器局部碰线或短路；</span></p><p><span>⑧电动机电路引出线及变速开关对地有短路;</span></p><p><span>④心电图机内直流电源滤波电容对地短路或击穿;</span></p><p><span>⑤直流电压对地短路；</span></p><p><span>⑥晶体管或集成电路对短路或击穿。</span></p><section data-tools="gulangu" data-id="89226"><section><section data-brushtype="text">3．通电后启动记录开关后走纸马达速度不准或不均匀</section><section><section></section><section></section></section></section></section><p><br  /></p><p><span></span><em><span>可能原因：</span></em></p><p><span>①传动齿轮咬合不良或齿轮损伤或传动机构有异物卡住；</span></p><p><span>②走纸开关接触不良或断线；</span></p><p><span>③马达转子线圈断线或接地板与记录单元电路板接触不良；</span></p><p><span>④集电极对发射极击穿短路等。</span></p><section data-tools="gulangu" data-id="89226"><section><section data-brushtype="text">4．接通电源启动START;键后走纸速度过快或过慢，纸速不能转换</section><section><section></section><section></section></section></section></section><p><br  /></p><p><span></span><em><span>可能原因：</span></em></p><p><span>①马达转速回路故障；</span></p><p><span>②马达转速传感器损坏；</span></p><p><span>③电路板间接触不良使马达转速传感器的回接线路中断；</span></p><p><span>④纸速转换开关或电路板接插处接触不良；</span></p><p><span>⑤走纸控制电路发生故障；</span></p><p><span>⑥纸卷安放位置不高、纸卷边缘过紧或过松等。</span></p><section data-tools="gulangu" data-id="89226"><section><section data-brushtype="text">5．描笔心电信号正常，纸速正常，但记录不出心电波形</section><section><section></section><section></section></section></section></section><p><br  /></p><p><em><span>可能原因：</span></em></p><p><span>①热笔温度低；</span></p><p><span>②描笔加热电阻丝烧断；</span></p><p><span>⑨记录纸接触不良；</span></p><p><span>④自激多谐震荡器停止振荡；</span></p><p><span>⑤笔温过高等。</span></p><section data-tools="gulangu" data-id="89226"><section><section data-brushtype="text">6．无毫伏定标信号，按压标准电压开关不起作用</section><section><section></section><section></section></section></section></section><p><br  /></p><p><span></span><span><em><span>可能原因：</span></em></span></p><p><span>①定标开关接触损坏：</span></p><p><span>②光电耦合器中光敏三极管损坏；</span></p><p><span>⑨标准电池的电压不足；</span></p><p><span>④差分放大器或封闭电路发生故障等。</span></p><section data-tools="gulangu" data-id="89226"><section><section data-brushtype="text">7．记录笔单偏基线调节键不起作用</section><section><section></section><section></section></section></section></section><p><br  /></p><p><span></span><span><em><span>可能原因：</span></em></span></p><p><span>①位置传感器信号的通路连接处接触不良；</span></p><p><span>②前置放大电路中直流放大器发生故障；</span></p><p><span>③高增益放大器发生故障；</span></p><p><span>④光电耦合器中发光二极管损坏；</span></p><p><span>⑤差分放大器发生故障等。</span></p><section data-tools="gulangu" data-id="89226"><section><section data-brushtype="text">8.交流电干扰</section><section><section></section><section></section></section></section></section><p><span></span><span><em><span>可能原因：</span></em></span></p><p><span>①地线接地不当；</span></p><p><span>②周围环境电磁波影响；</span></p><p><span>③导联线路的接线隐断、漏电连线插头或开关接触不良；</span></p><p><span>④操作不规范或患者自身因素影响；</span></p><p><span>⑤电源电压异常；</span></p><p><span>⑥差分放大器性能不良。</span></p><p><br  /></p><section><p><br  /></p><p><span><strong><span>【版权声明】：</span><span>本文由整理发布，资料源自网络，版权归原作者所有，转载请注明来源！</span></strong><br  /><br  /></span></p><p><br  /></p><section><p><img src="image/20200927/301730c5771e8bb0b95993d0967e1db9_3.jpg" /></p><span><strong>微信ID：yxiubang</strong></span></section><section><span><strong><p><img src="image/20200927/3d50c8c9238d63bc2f0cee8c97c8bf3a_4.jpg" /></p>长按左侧二维码关注</strong></span></section><p><br  /></p><p><br  /></p><p><br  /></p></section></section><p><br  /></p>