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TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Section 2 Preparation and Installation
2.1.2 Installation in
Hazardous Locations
Serpentine loop
2.1.3 ImportantInformation
Regarding "X" Marking
2-2
Read all labels carefully before installing the equipment!
The Laserflow Ex device is ATEX-approved for use in potentially
explosive atmospheres when specific conditions are met, as
described in this section in reference to "X" Marking.
The LaserFlow Ex is Group II, Category 1G equipment for use in
gas hazard zones 0, 1, and 2 (European standards), or Class I
Division 1 (North American standards).
The braid-drain lead depicted in Figure 2-1 is normally bonded to
earth through the Signature connector case terminals or conduit.
The mounting bracket used with the LaserFlow Ex should be
installed such that there is a conductive path from the LaserFlow
Ex case to earth. The internal circuitry utilizes a ground con-
nection to the conductive case.
Installation must be performed only by trained, qualified per-
sonnel.
Barriers or isolators required for certifiable safe installation are
the responsibility of the user. Refer to the control drawings pro-
vided in Figures 2-9.
Use only non-sparking metal for US mounting hardware.
Check with local authorities.
The mounting bracket is a potential isolated charge carrier.
For classified hazardous locations, refer to section 12.2.4
and local authorities for installation requirements.
Do not coil the sensor cable; this will form an inductor and
create a hazard. The cable should be kept as short as is
practical. If necessary, use a serpentine loop (see figure at
left) instead.
The ATEX labeling on the serial tag of the LaserFlow Ex device
includes a number ending in "X." The X marking indicates that
there are specific conditions that must be met in order for the
equipment to comply with intrinsic safety requirements. Refer to
Figure 2-1 on the following page.
These specific conditions are as follows:
• The cable must be terminated in a manner suitable for
the zone of installation.
• The physical spacing between the exposed ends of each
insulated wire lead, and earth ground and other IS
circuits, must be such that the equipment is isolated up
to 500V, and to 1500V for non-IS circuitry.
CAUTION
WARNING
WARNING
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