| Device Uncertainty | Urel≤0.05%（k=2） | ||
| Flow Stability | 1.0% for start‑stop method; 0.2% for other methods | ||
| Test Medium | Purified tap water | ||
| Operating Humidity | ≤ 93% RH | ||
| Operating Water Temperature | 20 ℃ ± 10 ℃ | ||
| Water Temperature Fluctuation in Single Measurement | Water temperature fluctuation in a single measurement | ||
| Water Fluctuation Coefficient per Cycle | ≤ ± 0.1% | ||
| Water Source Working Pressure | 0.0–0.5 MPa, adjustable | ||
| Air Source Working Pressure | 0.4–0.7 MPa | ||
| Device Operating Temperature | 4–50 ℃ | ||
| Number of Meters Under Test | DN50/65/80/100: 5 pcs | DN125/150/200: 2 pcs | DN250: 1 pc | DN300: 1 pc | ||
| Water Pump | 1 pc (CM10‑10): H=40 m, Q=10 m³/h, P=2.2 kW 1 pc (TD50‑40G2/4): H=40 m, Q=100 m³/h, P=18 kW 2 pcs (TD300‑40/4): H=36 m, Q=1200 m³/h, P=110 kW | ||
| Water Tank | 150 m³ | ||
| Commutator | DN15, DN25, DN50, DN100, DN400 cross‑fork pneumatic open commutator; low noise, high sensitivity; travel difference < 10 ms; uncertainty within 0.002% | ||
| Meter Clamping Mechanism | Stainless steel pneumatic meter clamp | ||
| Water Meter Seal Test | Pressure range: (0–2.0) MPa | ||
| Bore Diameter | Φ50 mm, telescopic stroke ≥ 80 mm | ||
| Timer | (10–100) kHz (adjustable); better than 10⁻⁶ | ||
| Calibration Signal | Pulse signal, f = (0–10) kHz | ||
| Vacuum System | Differential pressure vacuum generator; vacuum water filling to keep water meters fully filled | ||
| Supported Operation Modes | Fully automatic, semi‑automatic, touchscreen manual operation | ||
| Acquisition Equipment | 7 sets of pulse collectors, 7 sets of RS232/RS485 serial ports, 7 sets of camera meter collectors | ||
| Standard Device | Mass method | ||
| Flow Range | （0.010-2100）m³/h | ||
| Calibration Method | Start‑stop method | Diversion method | QTY |
| Electromagnetic Flow Meter Instantaneous Flow Display Advanced (Class 0.5) | DN6 50-500L/H | 1 | |
| DN15 320-3200L/H | 1 | ||
| DN40 2260-22600L/H | 1 | ||
| DN100 10-200m³/H | 1 | ||
| DN300 127-1100m³/h | 2 | ||
| Electronic Scale Mass Method Standard | ①Max=60kg，6000e | 1 | |
| ②Max=600kg，6000e | 1 | ||
| ③Max=3T，6000e | 1 | ||
| ④Max=30T，6000e | 1 | ||