Installing The Llt100 On Site; Safety Information; General Information; Environmental Considerations - ABB LLT100 Operating Instructions Manual
Laser level transmitter oi-llt100-en rev. d
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11 Installing the LLT100 on site
11.1 Safety information
All relevant directives, regulations, standards, accident
prevention regulations, and national standards must be
observed. Failure to observe warnings and instructions may
cause a malfunction or personal hazard.
WARNING
Damage to health/risk to life
Explosion hazard. Do not open or disconnect
the instrument when a flammable or combustible
atmosphere is present.
NOTICE
Aluminum models used in zone 0
Aluminum enclosures are considered to present a
potential risk of ignition by impact or friction. Care must
be taken into account during installation and use to
prevent impact or friction.
11.2 General information
The LLT100 is an optical, line-of-sight instrument that is used
for non-contact distance measurement. There must be no
obstacles directly in the beam path. The instrument can simply
be aimed directly towards an object and it will measure the
real physical distance from its surface.
Measurement accuracy is largely dependent on proper
installation of the LLT100. As far as possible, the measuring
setup should be free from critical ambient conditions such as
large variations in temperature, vibrations, or shocks.
NOTICE
If unfavorable ambient conditions cannot be avoided
for reasons relating to building structure, measurement
technology, or other issues, the quality of measurements
may be affected.
NOTICE
Very bright lighting conditions negatively impact the
amplitude of the signal received by the sensor, thus
affecting measurement performance.
Study
these
installation
proceeding. Before installing the LLT100, check whether the
device design meets the requirements of the measuring point
from a measurement technology and safety point of view.
This applies with respect to:
– Explosion protection certification
– Measuring range
– Temperature
– Operating voltage
instructions
carefully
before
Moreover, the suitability of the materials must be checked
with regards to their resistance to the media. This applies with
respect to:
– Gaskets
– Process connections, isolating diaphragms, mounting
screws, etc.
NOTICE
To maintain the enclosure IP66/IP67 and Type 4X
ratings, always use thread sealant or conduit seal.
NOTICE
Avoid mounting the transmitter close to a stream of
material that may fall in front of it.
Avoid aiming the transmitter down long narrow pipes
that have rough inner walls.
Ensure that the transmitter never points in the general
direction of the sun or its strong reflection.
After installing the instrument, check the operation over
the full range of conditions to be measured.
Any special settings that you may require should be loaded
into the device while it is inside the work area or workshop,
prior to mounting the LLT100 outside.
11.3 Environmental considerations
The LLT100 should be installed in an area that is within its
specified temperature range (see Appendix C, "Instrument
specifications", on page 59), taking into consideration the
enclosure ratings and the construction materials.
11.3.1 Hazardous area considerations
LLT100 housings are certified as conforming to protection
type IP66/IP67 (according to IEC 60529) or type 4X (according
to NEMA 250).
NOTICE
Exposure to certain chemicals may degrade the LLT100
window and the sealing properties of its sealing material.
The external housing is not made to resist high pressures.
Only the flange window can be in contact with the process.
The LLT100 must only be installed in hazardous areas for which
it is properly certified. The certification plate is permanently
fixed on the neck of the LLT100 top housing.
Property damage
Property damage
Property damage
OI-LLT100-EN Rev. D | User Guide 31
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