U3000/U4000 User Manual 51
(Issue 2.0)
Appendix A: Specification
GENERAL
DSP Measurement Technique: Transit time.
Timing Resolution: 50 pico-second, continuous signal level indication on display.
Flow Velocity Range: Minimum Velocity 0.1m/s; Max Velocity 20m/s: Bi-directional.
Turn Down Ratio: 200:1
Accuracy: ±0.5% to ±3% of flow reading for flow rate >0.2m/s and Pipe OD >75mm.
±3% of flow reading for flow rate >0.2m/s and Pipe OD in range 13mm - 75mm.
±6% of flow reading for flow rate < 0.2m/s.
Repeatability: ±0.5% of measured value or ±0.02m/s whichever is the greater.
Reynolds Number Correction: Flow velocity corrected for Reynolds number over entire velocity range.
Response Time: < 500ms depending on pipe diameter.
Selectable Flow Units: VELOCITY: m/sec, ft/sec.
VOLUME: l/s, l/min, l/h, gal/s gal/min, gal/h, USgals/s, USgals/min, USgals/h, Barrel/h,
Barrel/day, m³/s, m³/min, m³/h.
Selectable Volume Units: litres, m³.
Total Volume: 12 Digits - forward and reverse.
APPLICABLE FLUID TYPES
Fluid Condition: Clean liquids or oils that have less than 3% by volume of particulate content. Applications
include river water, sea water, potable water, demineralised water, glycol/water mix,
hydraulic systems and diesel oil.
APPLICABLE PIPE TYPES
Pipe Materials: Any sonic conducting medium such as Carbon Steel, Stainless Steel, Copper, UPVC, PVDF,
Concrete, Galvanised Steel, Mild Steel, Glass, Brass. Including Lined Pipes - Epoxy,
Rubber, Steel, Plastic.
Pipe Dimension (outside diameter): Min 13mm; Max 5000mm (with ‘D’ sensor set).
Pipe Wall Thickness: 1mm - 75mm.
Pipe Lining: Applicable pipe linings include Rubber, Glass, Concrete, Epoxy, Steel.
Pipe Lining Thickness: 0mm – 25mm.
Pipe Wall Temperature Range: Standard sensor operating temperature is -20°C to +135°C.
Optional high temperature sensor operating temperature is -20°C to +200°C.
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