开流仪表

开流仪表

开流仪表

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ENGINEERING CASE

提供先进、可靠的计量仪表和成套装置

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河南地区潜水电磁流量计安装现场

发布时间:
2019/06/13 09:01:06
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潜水电磁流量计功能特点:

Ø 全塑结构密封可靠,无活动部件,无阻力件,结构简单,工作可靠;

Ø 测量精度不受被测介质温度、压力、粘度、密度(包括液固比)等物理参数变化的影响;

Ø 适用于测量液固两相介质,像带有悬浮物、固体颗粒、纤维等粘性较大的导电性的浆液;

Ø 适用于明渠、暗渠、河道测量。适用于圆形、梯形、矩形和其它形状的渠道。测量不受河水上涨、潮汐、下游水位等变化的影响。

Ø 对上下游直渠段安装要求低,能在原有渠道上稍加改造即可;

Ø 采用仿真传感器(分流模型)可扩大流量测速范围。

测量流量范围大,最大流速可从1m/s到10m/s任意设定,输出型号与流量成线性关系。

安装位置的选择

⑴ 选择明(暗)渠横断面均匀,水流平稳处为传感器安装位置。传感器安装闸板上,并保证传感器全部潜入液面之下,闸板必须有足够的强度支撑传感器和经受液体动力作用。

⑵渠道顺直段的长度至少是渠道宽度的5倍。

⑶传感器上流向标点与渠道内被测介质流动方向必须一致。

安装中的注意事项:

安装前,用酒精棉球或清洁的细纱布仔细擦除传感器内的信号电极和接地电极表面,除去手摸等原因造成的油脂性玷污物

 安装前用万用表检查以下几项技标:

a) 励磁线圈阻值:励磁电缆线两端阻值应在(40-80)Ω范围内,如此时电阻值为无穷大或为零既出现断开或短路现象。

b) 电极阻值:信号电缆线两端分别应和一个电极导通。

c) 接地阻值:信号电缆线的屏蔽层应和接地电极导通。

 

d) 绝缘电阻:励磁电缆线两端,信号电缆线两端与信号电缆线屏蔽层之间的电阻应为无穷大。

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