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Measurement uncertainty: Urel≤0.2% (k=2)
Flow stability: 1.0% for start-stop method, 0.2% for other test methods
Test medium: Purified tap water
Flow range: 0.004~63 m³/h
Water supply working pressure: 0.2-0.5 MPa (adjustable); Air source working pressure: 0.4-0.7 MPa
Equipment operating temperature: 4~80℃
Applicable nominal diameter of tested meters: DN15-DN50
Applicable meter types: Ordinary mechanical water meters, various smart water meters (IC card meters, NB-IoT valve-controlled meters, MBus meters, etc.), electronic water meters (ultrasonic water meters, electromagnetic water meters, etc.)
Single-row testing quantity: DN15:10pcs, DN20:8pcs, DN25:6pcs
Double-row testing quantity: DN15:10pcs, DN20:8pcs, DN25:6pcs, DN32:2 pcs, DN40:2 pcs, DN50:2 pcs
Test method: Start-stop method
Water meter tightness test pressure range: 0~2.65 MPa
Standard volumetric provers: 10L/20L, 50L/105L, 300L/700L
Liquid level controller: Liquid level switch
Automatic liquid level reading system: Hikvision camera
Instantaneous flow indicator (rotameter, accuracy ≤2.5%):
LZ/W30-15:4-90L/h
LZ/W30-25:20-500L/h
LZ/W30-25:120-1600L/h
LZ/W30-50:500-8000L/h
LZB-80:7000-40000 L/h
Meter clamping mechanism: Double-cylinder outward push serial linkage clamper; single pneumatic clamper for front 10 and rear 5 positions, nominal bore Φ50mm, telescopic stroke ≥80mm
Vacuum system: Differential pressure vacuum generator, vacuum water filling to keep tested meters fully filled with water
Water temperature fluctuation per single measurement: ≤±2℃
Circulating water fluctuation coefficient per single cycle: ≤±0.1%
Meter reading collecting device: First-tier brand Android smartphones (Honor/Xiaomi/vivo) with over 50 million pixels
Water supply power system equipped with filter: Nanfang pump CHM10-50 (flow 8m³/h, head 48m); TD50-50G/2 (flow 65m³/h, head 30m)
Available operation modes: Fully automatic, semi-automatic, touch screen manual
Optional function: Electronic component inspection for water meters with standard format data import available
Warranty period: 2 years; all kinds of valves are excluded from warranty coverage
