Panametrics DigitalFlow XGF868i, Руководство для стартапов, Страница: 61 / 90

DigitalFlow™ XGF868i Startup Guide 51
Chapter 5. Specifications
Chapter 5. Specifications
5.1 Operation and Performance
5.1.1 Fluid Types
Flare and vent gases
5.1.2 Pipe Materials
All metals, fiberglass (Consult Panametrics for other materials)
5.1.3 Pipe Sizes
14 to 120 in. NB ANSI (350 to 3000 mm)
5.1.4 Flow Accuracy (Velocity)
5.1.4.1 High Flow Range: ±1.0 ft/s to ±394 ft/s (±0.3 to ±120 m/s)
One-Path: ±2.0%
Two-Path: ±1.5%
Note: For 4 to 12 in. NB pipe sizes, accuracy ranges from 1.5 to 4% (consult Panametrics for details). Accuracy to
±0.5% may be achieved with calibration.
5.1.4.2 Low Flow Range: ±0.1 ft/s to ±1.0 ft/s (±0.03 to ±0.3 m/s)
One-Path: ±0.008 f/s (±0.002 m/s)
Two-Path: ±0.0057 f/s (±0.0017 m/s)
Note: Accuracies listed assume a fully developed flow profile. A minimum straight pipe run of 20 pipe diameters
upstream and 10 pipe diameters downstream from the measurement point are recommended. Also,
consult Panametrics for the accuracy of non-standard flow transducer types.
5.1.5 Molecular Weight Accuracy
±1.8% of reading for hydrocarbon mixtures with molecular weights of 2 to 120 gr/gr mole
5.1.6 Mass Flow Accuracy
One-Path: ±2.7%
Two-Path: ±1.9%
Note: Dependent on the accuracy of the temperature and pressure inputs.