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JYM-15-50-06-AZ-PS2.0
| Availability: | |
|---|---|
| Device Uncertainty | Urel≤0.2%（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 | DN15: 10 pcs | DN20: 8 pcs | DN25: 6 pcs | DN32/40/50: 1 pc | Vertical water meters (DN15/DN20/DN25): 6 pcs | Vertical water meter (DN32): 2 pcs | Vertical water meter (DN40): 2 pcs | Vertical water meter (DN50): 1 pc | |||
| Water Pump | 1 × Nanfang CHM10‑50 (flow rate: 8 m³/h, head: 48 m); 1 × TD50‑40G/2 (flow rate: 50 m³/h, head: 30 m) | |||
| Water Tank | 2000 L | |||
| Commutator | DN25 & DN50 cross‑fork pneumatic open commutator; low noise, high sensitivity; travel difference 0 ms; uncertainty within 0.002% | |||
| Meter Clamping Mechanism | Dual‑cylinder outward‑push series pneumatic clamping mechanism; single pneumatic clamps for front 10 and rear 5 positions | |||
| 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 | 10 sets of mobile phones with ≥ 40‑megapixel resolution | |||
| Standard Device | Piston Method + Master Meter Method | |||
| Flow Range | （0.003-40）m³/h | |||
| Calibration Method | Start‑stop method | Diversion method | Flow–Time Method | QTY |
| Electromagnetic Flow Meter Instantaneous Flow Display Advanced (Class 0.5) | DN2：3-90L/H | 1 | ||
| DN10：20-500L/H | 1 | |||
| DN25：500-800L/H | 1 | |||
| DN50：8000-40000L/H | 1 | |||
| Electromagnetic Flow Meter Standard Meter Standard (Class 0.2–0.3) | DN2：3-90L/H | 1 | ||
| DN10：20-500L/H | 1 | |||
| DN25：500-800L/H | 1 | |||
| DN50：8000-40000L/H | 1 | |||
