# 主畫面數據解讀

## 瞬時流量及誤差

本流量計的最大可能誤差為 0.5 % F.S. + 2.5 % O.R.，換算為在不同流速下最大可能誤差與顯示數據的關係如下圖：

![](/files/-LxsRWH_C_Gceh7yfWQL)

## 流速

本畫面顯示的數據為流量計三通管內的流速，在大多數的情形下會比同口徑的直管位置的流速稍快。

## 累積流量及歷史記錄

累積流量畫面在被人為歸零前會持續計數。

累積流量的上限是 999,999,999 Litre 。


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