Panametrics Sentinel LCT, User Manual

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Sentinel LNG User’s Manual 5
Chapter 1. Features and Capabilities
1.2.3 Multipath Design
Multipath ultrasonic flowmeters are designed with more than one pair of transducers to interrogate the flow field in
different locations and more accurately determine the actual flow rate. The
Sentinel LNG
Measurement System uses
four measurement locations. These measurement paths are located across the meter body and tilted at an angle.
The two measurement paths are orthogonal to each other (see Figure 2 on page 4).
1.2.4 Flow Ranges
Typical flow rates for 0.5 m (19.6 in) per second and 10 m (393 in) per second are listed below. The
Sentinel LNG
is a full
bore meter and the flow range is a function of the pipe and not the meter itself.
1.3 Specifications
The system specifications for the
Sentinel LNG
Ultrasonic Liquid Flow Transmitter are divided into the following
categories:
1.3.1 Operation and Performance
1.3.1.1 Fluid Types
Liquified Natural Gas
1.3.1.2 Flow Measurement
Correlation Transit Time mode
1.3.1.3 Accuracy
< ± 0.20% of measured volume for flow rates between 2 and 30 ft/s (0.5 and 10 m/s).
1.3.1.4 Zero Stability
< 0.007 ft/s
0.5 m/s 10 m/s 0.5 m/s 10 m/s 0.5 m/s 10 m/s
Nominal Diameter 1.69 ft/s 33 ft/s 1.69 ft/s 33 ft/s 1.69 ft/s 33 ft/s
in mm (m
3
/h) (m
3
/h) (GPM) (GPM) (BBL/h) (BBL/h)
4 100 15 280 66 1230 94 1760
6 150 33 630 145 2770 207 3960
8 200 58 1130 255 4980 364 7120
10 250 91 1800 400 7900 573 11300
12 300 131 2500 580 11000 825 15700
14 350 179 3500 790 15400 1130 22000
16 400 233 4500 1030 19800 1470 28300
18 450 296 5700 1300 25100 1860 35900
20 500 365 7000 1600 30800 2300 44000
24 600 525 10000 2310 44000 3300 63000