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16249-51-4 报价
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无法预测需要挑开多少片IC后，才能找到故障IC。CPU主板元件焊接的“精致程度”已艰接近于手机的线路板，IC电路全为贴片元件，将IC引脚的铜箔条说成比头发丝还细，甚至于都不算是夸张。手底一不小心，挑掉铜箔条的话，想接起来都比较困难，挨片挑，这个法子也太笨了。
由于变频器的开关电源本身负载能力有限，接于故障电路时会引发过流保护，使开关电源停止输出。故采用外接容量较大的+5V电源，串接5Ω5W限流电阻接到CPU主板上，通电几分钟后，用手触摸CPU主板上的IC芯片，哪片烫手，有异常温升，即是哪片IC已经坏掉了。
这个法还真灵，挑开两片有异常温升的IC供电引脚，测其引脚电阻，均在十几Ω左右。此时再测+5V电源输出端，已经是数百Ω的正常阻值了。
这是个好法子，算是将错就错或将计就计或顺势而为，利用外接+5V供电，既对好的IC没什么危害，又使坏IC持续升温，暴露在我手指的“测温仪”下。特别适宜于检测CPU主板上出现的IC短路故障。
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磁翻板液位计供应UHZ-10磁翻板液位计厂家，
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上海仪华测控仪表有限公司
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结构原理
液位计由基本型现场指示，液位报警器和液位远传装置三部分组成。
基本型是按磁性浮子在液体中受到阿基米德定律向上浮力作用和磁钢同性相斥，异性相吸的原理研制而成。根据上述原理，将液位的线性变化...室内装饰装潢用激光测距仪，青岛金科测绘仪手持式激光测距仪
香港优利德UT391
0.1m60mm
测量精度± 1.5 mmmm
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技术指标
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说明
面积、体积测量
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支持m2/ft2/m3/ft3四种显示单位
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支持2次、3次间接测量
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连续测量
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/最小值测量
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多行显示
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最多可显示四行数据
测量基准边沿选择
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可选择机身顶部或者底部作为测量基准
蜂鸣提示
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背光
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白...湖南长沙恒邦语音群呼外呼系统专业服务商随着精确营销方式在企业公司销售方面所占的比重越来越大！精确短信、语音群呼、邮件群fa、邮件群fa等也是越来越受到企业负责人的关注，而语音群呼更是所有营销方式里所占比重大，方式最直接的。对此我司专业提供语音群呼业务办理。
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特点
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测量范围016000mm内由用户任意选择
指示精度526，528型 ±5mm 524型 ±10mm
介质密度≥0.45g/cm3
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上海仪华测控仪表有限公司
特点
结构简单 安装方便
检测功能齐全
测量范围大
指示新颖 读数直观
耐腐蚀 防爆
主要技术参数
基本型
测量范围016000mm内由用户任意选择
指示精度526，528型 ±5mm 524型 ±10mm
介质密度≥0.45g/cm3
介质粘度1ST10-4m2/s
连接法兰1PN2.5，4.0MPa时，法兰为JB/T82.2-94，DN25 PN4.0可动...
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