1.2 Multi-path design
Multi-path ultrasonic flow meters 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 LCT8
measurement system
uses eight measurement locations. These measurement
paths are located across the meter body and tilted at an
angle. The eight measurement paths are orthogonal to
each other. The sensor path placements provide the best
swirl and disturbance immunity.
1.3 Flow profile
One of the main factors that can adversely affect the
performance of an ultrasonic flow measurement is a
disturbed and unsymmetrical flow profile. Maintaining a
desired flow-profile shape across all flow velocities, pipe
sizes and upstream flow disturbances is difficult. For this
reason, Panametrics has tested the
Sentinel LCT8
under
various pipe configurations in an effort to determine its
operational specifications and immunity against cross
flow and swirl. Panametrics also completes calibrations
based on the specific customer application needs to ensure
the best meter performance. Owning to the design of our
Eight-path flowmeter, we are able to meet performance
specifications across a range of disturbances. Use of flow
conditions is normally unnecessary due to calibration
methods and meter design. If the need of a flow conditioner
is concluded, the meter calibration will be performed with
the flow conditioner in place.
1.4 Unpacking
The
Sentinel LCT8
is typically packaged in a wooden crate,
the size of which will depend on the size of product ordered.
It will be secured by several 2x4 wood blocks to prevent
shifting during transit. Simply remove these 2x4 braces to
unpack the system. For local-mount systems the transmitter
will be installed directly on top of the pressure vessel. For
remote-mount systems the transmitter and remote cable
may ship in a separate package.
1.5 Inspection
Prior to installation, inspect all materials to be used in
the installation:
•
Gaskets
- check for cracks, tears and over compression
(not included in
Sentinel LCT8
package)
•
Nuts and bolts
- check for damaged threads and for
debris (not included in
Sentinel LCT8
package)
•
RF flange faces
- check for damage to serrations that
may cause gaskets to not seal properly.
•
Flow conditioners
- check for blockages or damage
to the flow conditioner
In general, check for anything that may prevent safe
operation of the equipment.
IMPORTANT
If pipes are shipped pre-assembled as a single section,
care should be taken to inspect and check the bolts
and gaskets.
2
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