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       <h1 class="ny_newsdetail_title">溶解氧分析仪如何维护</h1>
       <div class="ny_newsdetail_tips">更新时间：2016-01-25&nbsp;&nbsp;|&nbsp;&nbsp;点击率：3397</div>
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          <span style="font-size: larger;">城市污水和工业废水处理厂的溶解氧监测。溶解氧仪主要用于确保水处理过程中有充足的溶解氧，以维持微生物的活性，并可通过控制曝气量优化能源的使用。GLI 溶解氧仪配置特殊溶解氧探头,适用于污水处理厂内各工艺点的监测。典型的应用环境包括调节池、曝气池、好氧/厌氧消解池和出水监测等。也可用于地表水、污水和盐水等各种水体溶解氧的测定。<br /><br />一、<strong>溶解氧仪</strong>日常使用注意事项&nbsp;</span><p><span style="font-size: larger;">　　1. 每天使用前做一次标定，采用水饱和气法，一天内即使关过机也不必再标定；</span></p><p><span style="font-size: larger;">　　2. 标定和测量时的温度不要相差太大，不超过＋－5℃为宜；</span></p><p><span style="font-size: larger;">　　3. 读数不正常一定要换溶解氧仪膜（如开机后读数不稳定或不是从高到低趋于稳定）；</span></p><p><span style="font-size: larger;">　　4. 换溶氧仪膜时电解液内不能留有气泡，膜不能折皱，多余的膜割除干净；</span></p><p><span style="font-size: larger;">　　5. 传感器电解液干了一定要换溶氧膜；</span></p><p><span style="font-size: larger;">　　6.换溶氧膜时要用去离子水或蒸馏水冲掉旧电解液，滴入2－3滴新电解液甩干。普通溶氧传感器要滴满新电解液至液面鼓起，压上溶氧膜，不留气泡；盖膜要注入半量新电解液，旋紧；</span></p><p><span style="font-size: larger;">　　7. 盖膜更换后即可使用，普通膜更换后应放置一夜，让膜*恢复平衡；</span></p><p><span style="font-size: larger;">　　8. 溶氧膜表面受到沾污要细心清洗干净，不能损伤膜；</span></p><p><span style="font-size: larger;">　　9.YSI正式推荐2－4周换一次溶氧膜，但在水质条件好、维护得当的情况下，甚至可长达半年换一次溶氧膜，前提是每次标定读数正常；</span></p><p><span style="font-size: larger;">　　10. 测量时如果底部不断冒气泡，应将传感器头朝上，绑在电缆上，不能让气泡停留在溶氧膜表面；</span></p><p><span style="font-size: larger;">　　11. 普通溶氧传感器测量时需要搅拌，适当的搅拌有利于获得真实的溶氧读数。快速脉冲法和微电极阵列（MEA）测量时无需搅拌；</span></p><p><span style="font-size: larger;">二、</span><strong style="font-size: 14px;">溶解氧仪</strong><span style="font-size: larger;">标定</span></p><p><span style="font-size: larger;">　　1. 采用水饱和气法；</span></p><p><span style="font-size: larger;">　　2. 标定时以"％"方式，除非有特定要求，避免以"mg/l"方式；</span></p><p><span style="font-size: larger;">　　3. 将传感器置于瓶内湿气中，不与水直接接触，瓶与大气不要*隔离；</span></p><p><span style="font-size: larger;">　　4. 放置15分钟以上，让水气饱和，趋于平衡，或溶氧和温度读数稳定；</span></p><p><span style="font-size: larger;">　　5. 输入正确的大气压数值（以mmHg柱）；</span></p><p><span style="font-size: larger;">　　6. 标定稳定与实测温度相差不大于＋－5℃；</span></p><p><span style="font-size: larger;">　　7. 确定标定值。</span></p><p><span style="font-size: larger;">三、</span><strong style="font-size: 14px;">溶解氧仪</strong><span style="font-size: larger;">维护</span></p><p><span style="font-size: larger;">　　1. DO charge 超出25－75要打磨传感器；</span></p><p><span style="font-size: larger;">　　2. DO gain 超出1＋－0.4要打磨传感器；</span></p><p><span style="font-size: larger;">　　3.打磨前洗净、擦干传感器，金阴极用400目砂纸打磨，银阳极用800目砂纸打磨，平行打磨10－15次，冲洗擦干，滴上2－3滴新电解液甩干，灌满电解液，换上新膜；</span></p><p><span style="font-size: larger;">　　4. 传感器插口应干燥、清洁，严禁潮湿或沾污；</span></p><p><span style="font-size: larger;">　　5. 传感器受到硫化氢或二氧化硫毒化时，用3％氨水浸泡一夜，然后冲洗干净，或用超声波清洗，换上新膜，重新标定；</span></p><p><span style="font-size: larger;">　　6. 标定时读数不稳定，或测量时响应太慢，应对传感器进行维护（打磨、氨水浸泡或超声波清洗）。</span></p><p><span style="font-size: larger;">四、存贮方式</span></p><p><span style="font-size: larger;">　　短期存贮：1.将传感器置于瓶内湿气中，不直接与水接触，将瓶口密封，定期检查，保证瓶内留有适量水。</span></p><p><span style="font-size: larger;">　　长期存贮&nbsp;：1. 传感器用去离子水洗净擦干，灌新电解液，装上新膜，放置阴凉处；</span></p><p><span style="font-size: larger;">　　2. 可在标定杯装适量水，将传感器置于杯内密封；</span></p><p><span style="font-size: larger;">　　3. 1－2个月检查一遍，保证水不干，不滋生微生物。</span></p>
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