Dab tsi yog qhov siab tshaj plaws khiav ntau rau vortex meter calibration?

1. Hom Calibration Flow Ranges (ib JJG 1029 & ISO 12764)

• Cov dej (dej, thiab lwm yam):
  • Calibration ntau yam:0.3 ~ 700 m³ / h(DN15-DN200)
  • Max ceev:10 m/s
• Gases (cua, natural gas):
  • Calibration ntau yam:0.5 ~ 7,000 m³ / h(DN15-DN300)
  • Max ceev:60-80 m/s
• Chav:
  • Calibration ntau yam:0.4 ~ 28,000 m³ / h(DN loj)
  • Max ceev:70-80 m/s

2. Cov Cai Tseem Ceeb uas txhais tau tias "Max Flow"

• Reynolds tus lej (Re):
  • Yam tsawg kawg nkaus linear Re:2 × 10 ⁴(liquid) /4 × 10 ⁴(gas/chaw)
  • Maximum Re:7 × 10 ⁶(sab saum toj txwv rau ruaj khov vortex shedding)
• Qhov ratio: Feem ntau10:1(max flow = 10 × min flow)
• Qhov zoo tshaj plaws calibration cheeb tsam: 20% -80% ntawm cov 'meter' nominal range(10% -90% rau cov qauv muaj tseeb)

3. Piv txwv: DN100 Vortex Meter (Dej)

• Nominal max flow:120 m³ / h(≈4.2 m/s)
• Calibration ntau yam:12-120 m³ / h(10: 1)
• Qhov zoo tshaj plaws calibration ntsiab lus:24, 48, 72, 96, 120 m³/h

4. Calibration Standard Requirements

• Yam tsawg kawg xeem cov ntsiab lus: 6(nrog rau min thiab max flow)
• Kua dej: Siv cov txheej txheem tiag tiag los yog cov kua dej nrogpiv Reynolds tus lej