…The impeller and the pointer or counter of the display are mechanically connected, but there are also meters that separate only the indicator and transmit an electrical signal to enable centralized or automatic meter reading, and are called remote-reading meters. The flow rate at which the water meter's pressure loss is 5m of water column is called the reference flow rate, and the allowable tolerance for flow rates up to 1/5 of this is generally ±2.5% of the indicated value, and for the range from 1/5 to 1/20, the allowable tolerance is generally ±4% of the indicated value. [Yamazaki Hiroo] … *Some of the terminology that refers to "reference flow rate" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…羽根車と表示部の指針やカウンターとは機械的に結合しているが,指示部のみを分離し,電気信号で伝達して集中検針や自動検針を可能にしたものもあり,隔測形と呼ばれる。 水道メーターの圧力損失が水柱5mになる流量を基準流量と呼び,それから1/5の流量までの許容公差は指示値の±2.5%,1/5未満1/20までの範囲は指示値の±4%が一般的特性である。【山崎 弘郎】。… ※「基準流量」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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