Piston Water Meter Verification Device-Ultrasonic Water Meter Test Equipment
1. Device flow range: (2-8000) L/h;
2. Device uncertainty: ≤0.2% (k=2)
3. Pressure range: 0-1.6MPa;
4. Ambient temperature: 15- 30℃;
5. Relative humidity: (45%-75%);
6. Atmospheric pressure: (86-106) kpa;
7. Supply voltage: 400V±5%, 50HZ;
8. Air source pressure: (3.5-6) bar;
9. Acquisition method: MBUS/RS485/infrared;
10. Equipment power: water pump 2.2KW, heating 6KW;
11. Quantity of meter inspection: ultrasonic meter (DN15: 10 pieces, DN20: 10 pieces, DN25: 8 pieces);
12. Equipment size: length, width, and height (5800 mm *1500 mm *2000mm)
Device Composition
The device consists of a water source system, a piston system, a clamp meter pipeline, a flow regulating device, a standard device system, a software control system, and a data acquisition system;
Water System
Water pump or piston: the maximum flow rate is 8m³/h, controlled by frequency converter, the software can set different frequencies
Balloon-type surge tank: used to stabilize the pressure of the pipeline system, the flow rate of Q3 and above is supplied by a water pump, and it is also used to flush air bubbles before detection.
Water tank: 304 stainless steel, the bottom of the water tank is equipped with a liquid level sensor, the software system can collect the current liquid level value of the water tank, equipped with an electric heating device, and the water temperature control accuracy is ±1 °C.
Piston System
The standard cumulative flow of the piston device is the product of the piston's inner cross-sectional area and the piston displacement in the time period. Therefore, the accurate measurement of the piston displacement is one of the key factors to reduce the uncertainty of the device. The piston-cylinder diameter is 215mm, and a temperature and pressure sensor is installed at the piston outlet for error compensation of the piston cylinder diameter. In order to improve the accuracy of displacement measurement, the device uses a grating ruler to measure the displacement of the piston. The output signal of the grating ruler is an AB quadrature signal with an accuracy of 1us.
Piston volume: 25L
Applicable flow range: 2L-2500L
Resolution: Resolution 0.036ml
Drive motor: Panasonic servo motor
Grating ruler: Germany ELGO/24V/1us
Temperature sensor: Lichuang/PT100/A class
Pressure sensor: Mico/4-20MA/0.5 class
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