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Gas flow calibration equipment of DN15～DN150 positive pressure sonic nozzle method and microcomputer automatic control s
Introduction: The system uses air as the medium, the critical flow venturi nozzle as the standard meter, and the flow meter is verified or tested by means of a vacuum pump to generate negative pressure in the system. The calibration diameter is DN15-DN200 (later can be extended to DN400), the test flow range is 1-7000m3/h (later can be extended to 10000m3/h), and the device expansion uncertainty is better than 0.3% (K=2)
Main technical parameters:
- Calibrated caliber size: DN15～DN150
- Calibration method: sonic nozzle method
- Uncertainty of equipment expansion: master meter method 0.33%,0.5%
- Gas source pressure: ≤0.8MPa；
- Structural style: tiling
Main technical features:
- This calibration equipment is applied to the calibration of flowmeters of which medium is positive pressure air
- Sonic nozzle is adopted as the standard;
- Computer automatic control of flow and data acquisition system are adopted