Nozzle-Specific Considerations; Vessel-Specific Considerations; Gathering The Necessary Tools - ABB LWT300 series User Manual

• Avoid routing cables with other electrical cables (with inductive load, motors, etc.) or near large
electrical equipment.
• You must use ½-inch NPT/M20 cable glands certified to either Ex db or Ex tb (depending on the
installation), and rated to at least IP68/NEMA Type 6P. Cable glands supplied by ABB are ATEX- and
CE-certified, and meet the above requirements.
• These cable glands can only be used with braided shield cables. When installing them, make sure to
fold the cable shield over the O-ring which presses the braiding against the inside wall of the body,
thus ensuring good contact.
NOTICE
If you plan on using cable glands that are not supplied by ABB, refer to your supplier's
data sheet for proper installation.

Nozzle-specific considerations

• Nozzle length is configured for system operation and not for calibration purposes. It is automatically
taken into account (subtracted) when measurements are made.
• Probes installed in side-vessel connections require additional probe support within the nozzle
connection.
• Probes installed in very agitated processes need a spacer at the top connection to prevent the probe
from touching any part of the nozzle.

Vessel-specific considerations

Plastic and fiberglass tanks, and open air installations
LWT instruments installed in a non-metallic vessel or in open air environments will be subject to
interference from other electromagnetic devices, e.g., radios. You may need to use stilling wells to
eliminate such interferences.
Concrete tanks
Concrete tanks require mounting the probe:
• 30 cm (1 ft) from the wall (for measuring lengths up to 6.1 m [20 ft]);
• 61 cm (2 ft) from the wall (for measuring lengths over 6.1 m [20 ft]).
The face of the LWT mounting/launch plate should be even with the inner surface of the concrete roof.

Gathering the necessary tools

To proceed with the installation of a LWT instrument, you need some basic tools such as:
• 3 mm hexagonal key
• ¼", 5/16", 3/8" and 7/16" wrenches, or adjustable wrench
• Flat head screwdriver (¼")
• Safety footwear and goggles
• Protective gloves
• ESD protection equipment
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Installing the LWT