Measuring principle:
The instrument is designed according to the flow velocity area measurement principle of the open channel flow measurement, and the flow rate can be obtained by measuring the flow rate. Q=V·S (S is the sectional area)
1. Flow rate measurement:
When measuring the flow rate, the propeller-type rotor current meter is rotated by the water and the built-in signal device generates a revolution number signal. The flow rate is calculated by the following formula:
KN
V=———————— + C( m/s )
T
Where: V: mean flow velocity ( m/s ) during the measurement period
K: blade hydraulic pitch C: flow meter constant
T: duration of flow (in units of S) N: number of signals in period T
When the instrument is used, K and C are all constants. When measuring the flow, T and N can be measured to determine the flow rate.
2. Flow calculation:
Flow rate measurement According to the flow velocity area measurement method for open channel flow, the flow rate is first multiplied by the area of ​​the cross section to obtain the flow rate.
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Taizhou Chenhui Machinery Manufacturing Co., Ltd , https://www.chenhuipulley.com