Flow Meter

Portable velocity flow meter (abbreviated portable flow meter) is designed for hydrological stations, factories and mines, environmental monitoring stations, agricultural irrigation, hydro-geological surveys and other departments to open channel flow velocity measurements in the field and developed. Portable flow meter is mainly composed of LS1206B type Propeller Flow sensor (or other types of spinning cup Propeller Flow Meter), LS1206B type flow rate calculation instrument, 0.4m × 4Ф16 measuring rods. A full set of advanced aluminum instrument in the password box. In use, as shown in Figure 1 assembled into one, on signal line can be measured in each open channel flow, and automatically displays the flow rate. Figure 1. The portable flow meter installation diagram of the instrument structure is simple, light and easy, low power consumption, full-featured, high degree of automation, stable and reliable, consistent with national open channel flow measurement standard, 100-degree heat propeller configuration, is currently the new portable flow measuring instrument. One. The technical requirements of the instrument: KN speed formula: V = ------- + C (m / s) (automatic calculation) T Instrument Number: ???? _____, K _____, C______ speed range: 0.06-5.00 m / s (can to 7.00m / s) flow measurement error: ≤1.5% Display: 2 × 16 digit LCD display measurements: measuring rod positioning measurements (also cable suspension positioning measurements) Temperature range: -20 ℃ - 50 ℃ Power : DC5V (4 AA NiMH rechargeable battery), after the full can work for 40 hours two. Measuring principle: The instrument designed according to the principles of open channel flow measurement of velocity area method, measure the flow velocity can be obtained Q = V S (S is a sectional area) 1. flow rate determination:? When measuring flow rate, driven by a hydraulic propeller rotor Flow Meter rotation, built-in signal means for generating revolution number signal, the flow rate is calculated by the following formula: KN V = -------- + C (m / s) T where: V: average velocity in the flow measurement period (m / s) K: hydraulic blade pitch C: Flow Meter constant T: flow measurement duration (in S) N: T time period when the number of signals in this instrument, K, C are constants, measured flow, measured as long as T and N, you can calculate the flow rate. 2. Calculation of flow: Flow measurement based on open channel flow measurement of velocity area method, first measure the velocity multiplied by the cross-sectional area to obtain traffic. III. Instrument, use: normal, plug it in turn, pull off the instrument power supply can power the display when the last shutdown velocity meter parameters are chosen. Parameter settings as follows: If the same parameters, you can enter the flow measurement. Figure 1. The measurements showed 3.1 parameter setting operation: Check whether the display parameters used in flow meter in line with, if not, press the MENU key to enter setup 1, after setting parameters by 3.2 Measurement data is correct, press 'right keyboard + Move' That can save parameters and return to the measurement mode; measuring mode, the display as shown: If the automatic measurement, the instrument after each measurement automatically according to the formula to calculate the flow rate value and displays 3V = 0.000M / S, fixed display 3 -5 seconds after repeated measurement, but the flow rate value will remain displayed until the end of the next measurement. If manual measurements After each measurement, to be read number, press the start-stop button, then the next measurement. Measurement, when the first signal comes, can be seen from the display starts counting the time T, N start counting when the time T reaches the set time again when a signal is received, the instrument automatically shut down T, N, and automatically calculates the velocity V, to be displayed after a delay of 3-5 seconds, the instrument automatically start the next flow measurement, repeat the process, in this measurement, the flow rate value is displayed on the V once for easy reference and record. 3.1.1 right key and the Shift keys to change the display. Such as: C is 0.0150, the first operation of the right key, the cursor is shifted to the C = .0100 place, press the Shift key, each time you press the plus 1, repeat press until the cursor is located and the median value consistent with the required value, that is, C = 0.0150 can. Modify K value, measured time T as above, press the right shift key, then press the shift key addend, until it is correct. After pressing the wrong operation can be repeated. Display, automatically "0" symbol automatic measurement, set to "0" for the automatic measurement, For manual measurements, the symbol should be set to "1." Display delay 3 seconds, the setting is finished into the measurement interface, after 3 seconds, the automatic measurement process began. If the automatic measurement, the instrument automatically repeat measurement times (interval of delay time). If manual measurements, measuring when you need to press the button to start and stop the measurement and stop reading until the number, press the start-stop button, then the next measurement. Sectional area of ??the output: the unit is set up after the square cross-sectional area of ??the flow can be drawn, the formula Q = V S (S is a sectional plane 3.1.3 version number displayed after communication communication (default no communication) 3.2 measurement data set parameters correct? while pressing the 'right keyboard + Move' which can save parameters and return to measuring status; measuring mode, the display as shown: If the automatic measurement, the instrument after each measurement automatically according to the formula to calculate the flow rate value and Display 3V = 0.000M / S, fixed display 3-5 seconds after repeated measurement, but the flow rate value will remain displayed until the end of the next measurement. If manual measurements After each measurement, the number to be read later, according to a Commitment key to the next measurement. When measuring, when the first signal comes, can be seen from the display starts counting the time T, N start counting when the time T reaches the set time, then a signal is received, the instrument automatically Close T, N, and automatically calculates the velocity V, to be displayed after a delay of 3-5 seconds, the instrument automatically start the next flow measurement, repeat the process, in this measurement, the V value on the time display flow rate value, ease of reference and record 3.4 shutdown: After each use of the instrument, as long as allocated under the plug, the instrument will automatically shut down, and shut down before the save flow meter model and parameters selected, the next time you use, only need to plug it in, connect the flow meter, according to a survey conducted to screen for key stream four work computer on-line operation (when ordering No such function) with the dedicated communication cable connection is estimated with the computer communication port, Turn on the computer into the WINDOWS platforms - Programs - Accessories - Communications - HyperTerminal, set the baud rate of 2400, the communication bit is 8, 1 stop bit, no parity, flow control mode for the software, select the correct communications mouth, turned measure meter power line signal to start measuring stream flow until after the end of each measurement period, estimates the instrument automatically sends a set of data to the computer screen. K = 7800 C = 0.050 T = 0106.5 N = 0015 V = 0.160 K = 7800 C = 0.050 T = 0108.4 N = 0016 V = 0.165 five equipment maintenance: measure instrument maintenance, not short-term, you must disconnect the plug (disconnect power) when not in use to save the long-term, three months shall be. The charging time after each use, rinse with water flow meter, the measuring rod, and dry with a towel and store flow meter maintenance, washable see six manual instrument flow meter full set of equipment:... LS1206B speed estimates a 16 meter measuring rod (4-400) a pair LS1206B meter propeller a signal-line pair * Communication cable (optional) * a pair of tail (optional) one Charger one accessory: LS1206B portable flow rate calculation instruction manual a this