| Electronics > Beginners |
| electromagnetic flow meter |
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| deepakdange:
i have developed 1.5" electromag. it works fine when straight run is there or on the mouth of pump driven by 3 phase electric motor. but when the same pump is driven by hydraulic motor i get enhanced readings. viz. pump rpm 1440 which is fix for both motors and let flow is 13.2 m3/hr on electric motor then it comes 24 m3/hr on hydraulic motor? arrangement is 2" pump, 2" 3 way valve, elbow with 1.5" reducer, electromag and almost straight run open system. |
| Vtile:
How is the motors verified to give the same RPN? How is the flow of water measured to verify your readings from the prototype? |
| deepakdange:
there is standard calibrated rpm indicator, electromag,etc. flow is the same (which can make variable from 0 to 26 m3/hr) i am getting enhanced signal at amplifier output on hydraulic which is measured on the scope. viz. 5v operating(single supply) system, reference(grounding rings, etc) at 2.5v input preamp. INA333 with gain = 5 and standard circuit design for electromag(ref texas instruments) batching are matched within a liter measured for 25, 50, 100, 200 liters. motor electric hydraulic zero 1948/1934 1948/1934 13.5m3/hr 2188/ 1690 2450/1422 batching 25 24.6 34 50 49.8 71-73 100 99.2-100.6 142-160 200 198-201 276-284 slope gets changed but linear function. is there any physical parameter affecting the system? |
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