開流儀表

開流儀表

開流儀表

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ENGINEERING CASE

提供先進、可靠的計量儀表和成套裝置

案例詳情

河南地區潛水電磁流量計安裝現場

發布時間:
2019/06/13 09:01:06
瀏覽量

潛水電磁流量計功能特點:

全塑結構密封可靠,無活動部件,無阻力件,結構簡單,工作可靠;

測量精度不受被測介質溫度、壓力、粘度、密度(包括液固比)等物理參數變化的影響;

適用于測量液固兩相介質,像帶有懸浮物、固體顆粒、纖維等粘性較大的導電性的漿液;

適用于明渠、暗渠、河道測量。適用于圓形、梯形、矩形和其它形狀的渠道。測量不受河水上漲、潮汐、下游水位等變化的影響。

對上下游直渠段安裝要求低,能在原有渠道上稍加改造即可;

采用仿真傳感器(分流模型)可擴大流量測速范圍。

測量流量范圍大,最大流速可從1m/s到10m/s任意設定,輸出型號與流量成線性關系。

安裝位置的選擇

⑴ 選擇明(暗)渠橫斷面均勻,水流平穩處為傳感器安裝位置。傳感器安裝閘板上,并保證傳感器全部潛入液面之下,閘板必須有足夠的強度支撐傳感器和經受液體動力作用。

⑵渠道順直段的長度至少是渠道寬度的5倍。

⑶傳感器上流向標點與渠道內被測介質流動方向必須一致。

安裝中的注意事項:

安裝前,用酒精棉球或清潔的細紗布仔細擦除傳感器內的信號電極和接地電極表面,除去手摸等原因造成的油脂性玷污物

 安裝前用萬用表檢查以下幾項技標:

a) 勵磁線圈阻值:勵磁電纜線兩端阻值應在(40-80)Ω范圍內,如此時電阻值為無窮大或為零既出現斷開或短路現象。

b) 電極阻值:信號電纜線兩端分別應和一個電極導通。

c) 接地阻值:信號電纜線的屏蔽層應和接地電極導通。

 

d) 絕緣電阻:勵磁電纜線兩端,信號電纜線兩端與信號電纜線屏蔽層之間的電阻應為無窮大。

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