(more commonly used than appearance flowmeter calculates) , 
, the ratio of A is respectively 1.016, 1.055, 9, the K/ of ＝ of appearance coefficient K′ that computation amends an appearance to fall in 900mm caliber condition (1.016×1.055×9.000) ＝ 21.038, again conversion is become spend frequency F completelyMaxThe appearance when ＝ 41.2Hz is actual Q of the largest flowMax＝ 7050m3/ H finishs the demarcate that inserts flowmeter of type eddy street to repair direct ratio to be opposite namely. Through farther estimation, correction result and error of traditional and theoretical calculation are 0.5 ％ left and right sides about, the measurement that can satisfy the spot needs.
Additional, after appearance installs the spot, can undertake be debugginged appropriately according to the gain of amplifier of actual condition appearance and sensitivity, make appearance achieves optimal moving status, this are very important also.
4 last words
Through the experiment of period of time, it is effective and feasible that the proof revises realer than getting instrument to the law service data with demarcate. We applied this method to amend a batch to measure the insertion with data bigger error the appearance data of flowmeter of type eddy street, get each are approbated just, those who ensured water of company large flow measures metric data is accurate. Of course, the condition impact such as the setup that because insert the measurement of flowmeter of type eddy street,precision gets spot conduit, instrument is bigger, of correction coefficient itself calculate the error with also exist certain, because this has a lot of problems,still remain to be discussed further.
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