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} }); function showliuyan(me, showtype){ if(showtype==0){ //$("#Content").val($("#Content").attr('placeholder')); Content= document.getElementById('PopMsgFrom').Content.getAttribute('placeholder'); document.getElementById('PopMsgFrom').Content.value=Content; } if(showtype==1){ // $("#Content").val($(me).text()); alert($(me).text()); document.getElementById('PopMsgFrom').Content.value=$(me).text(); } $(".fxp").css("display","flex"); } function close_popwin(){ $(".fxp").css("display","none"); // 关闭虚拟电话后的留言� $(".dhxj").css("display","none"); $(".dhxjbox").css("display", "none"); $(".dhxjbox2").css("display", "none"); return false; } </script>  <div class="cpjs"> <div class="cpjs_tab"> <div class="js_cpjj" style="border-bottom: 3px solid #1479d7; color: #1479d7;">产品介绍</div> <div class="js_cxd">创新炸�/div> <div class="js_xgfa">相关方案</div> <div class="js_xgzl">相关资料</div> <div class="js_yhpl">用户评论</div> <div class="js_gsdt">公司动�?/div> <div class="js_wsj">问商宵�/div> </div> <script> $(function(){ // 切换 $(".cpjs_tab a").click(function(){ $(".cpjs_tab a").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <h3 style="margin: 0px auto; padding: 0px; list-style: none; font-size: 16px; color: rgb(102, 102, 102); font-family: 微软雅黑; white-space: normal;">产品介绍</h3><p style="margin: 0px auto; padding: 0px; list-style: none;"><span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; background: rgb(243, 243, 243);"><span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">一、概</span></span><span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; background: rgb(243, 243, 243);"><span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">�?/span></span></p><p style="margin: 0px auto; padding: 0px; list-style: none;">7000 <span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">系列智能电磁流量讠�/span>（以下简称流量计），主要用于测量连续或间�?span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">流经封闭管道中导电液体及液固两项流体的体积流量。它的测量精度不受被测量介质的温度、密度、粘度及导电率（＝�/span>5μs/cm）的变化影响。选择合适的电极材料和衬里材料，可以测量各种腐蚀性液体以及强磨损的矿浆等介质的流量。广泛应用于石油、化工、冶金、轻纺、制药、造纸、电力、环保及城市给排水和环保等领域、�/p><p style="margin: 0px auto; padding: 0px; list-style: none;">主要特点９�/p><p style="margin: 0px auto; padding: 0px; list-style: none;">l 测量管内无阻流件，压力损失几乎为零；</p><p style="margin: 0px auto; padding: 0px; list-style: none;">l 耐腐蚀、耐磨损；</p><p style="margin: 0px auto; padding: 0px; list-style: none;">l 测量精度高，工作稳定可靠：�/p><p style="margin: 0px auto; padding: 0px; list-style: none;">l 抗干扰能力强，量程范围宽：�/p><p style="margin: 0px auto; padding: 0px; list-style: none;">l 多种标准接口�?4�?0)mA <span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">电流输出、脉冲输出、报警输出及</span> RS-485 <span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">通讯等、�/span></p><p style="margin: 0px auto; padding: 0px; list-style: none;"> </p><p style="margin: 0px auto; padding: 0px; list-style: none;"><span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; background: rgb(243, 243, 243);"><span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">二、结构与工作原理</span></span></p><p style="margin: 0px auto; padding: 0px; list-style: none;"> </p><p style="margin: 0px auto; padding: 0px; list-style: none;">1、结枃�/p><p style="margin: 0px auto; padding: 0px; list-style: none;">流量计由流量传感器和转换器两部分组成。按传感器与转换器的组装方式分为一体式和分离式两种形式、�/p><p style="margin: 0px auto; padding: 0px; list-style: none;">传感器主要由测量导管、测量电极、励磁线圈、铁芯、磁轭及壳体组成、�/p><p style="margin: 0px auto; padding: 0px; list-style: none;">转换器即为二次仪表。主要功能是：流量信号放大处理、单片机内部运算、流量及累计值显示，同时根据需求配备相关外输信号接口、�/p><p style="margin: 0px auto; padding: 0px; list-style: none;">2、工作原琅�/p><p style="text-align:justify;margin: 0px auto; padding: 0px; list-style: none;"><span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">测量原理是基于法拉第电磁感应定律</span>(见图 1) 在传感器的测量管外侧设置了一个交变的外加磁场并在与其磁力线方向垂直的两侧安装一对电极。当导电介质流过测量管切割磁力线时，在电极上产生感应电动势E、�/p><p style="text-align:justify;margin: 0px auto; padding: 0px; list-style: none;"><span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">感应电动劾�/span>E 具有下面的关系式９�/p><p style="margin: 0px auto; padding: 0px; list-style: none;">E=K·B·V·D 式中 E：感应电动势</p><p style="margin: 0px auto; padding: 0px; list-style: none;">K：仪表常数B：磁感应强度</p><p style="margin: 0px auto; padding: 0px; list-style: none;">V：测量管截面内的平均流� �?nbsp;2.1</p><p style="margin: 0px auto; padding: 0px; list-style: none;">D：测量管内径</p><p style="text-align:justify;margin: 0px auto; padding: 0px; list-style: none;"><span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">由于式中</span> K、D、B <span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">可以确定不变，那么电动势</span> E <span style="margin: 0px auto; padding: 0px; list-style-type: none; border-width: 0px; font-family: 黑体;">跟介质的平均流逞�/span>V <span style="margin: 0px auto; padding: 0px; list-style-type: none; 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