| Ningbo Jiangbei Dongfang Water Meter Instrument Factory |
Mobile: (0) 13905746717
Address: Zone C, Jiangbei Investment and Entrepreneurship Center, Ningbo
| The working principle and composition of measurement standards! |
| Publisher: Website release time: 2013-9-27 Read: Times |
The working principle of the standard device of the water meter verification device is the volume method. The water meter is correctly clamped on the water meter verification device, and the rotor flowmeter adjustment valve is operated to make the water flow through the water meter according to the specified flow value and enter the standard container. The reading indicated by the water meter pointer and the volume value shown in the standard container give the water representation error. % 100 QQ QEm E —— Indication error of water meter, expressed by the percentage of actual water passing Q — Actual water passing, L Qm — Water indicated by water meter pointer, L water meter verification device is generally composed of voltage stabilizer , Clamp meter device, front and back straight pipe section, flow regulating valve, flow indicator (rotor flow meter), workload meter, drain valve and piping system. The full performance water meter verification device should also include a hydraulic strength test device and an accelerated wear test device. Because the workload meter can reach 0.1% accuracy after calibration, the dynamic volume method or static volume method can be used to carry out the verification / calibration of 0.5% and below working flowmeters.