Panametrics C-RL, Инструкция по эксплуатации

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Model C-RL User’s Manual 1
Chapter
Panametrics Measurement & Control Clamp-on Ultrasonic Flow
Transducer Types C-RL, C-RS & C-RV
When installing this apparatus, the following requirements must be met:
•
The certification covers the Panametrics clamp-on transducers fitted with an IME 7080 series enclosure (an Ex d
& tb approved metal enclosure) and a clamping fixture, the assembly complying with the requirements of EN
60079-1 and
EN 60079-31, and providing a degree of protection of IP6X. The following standards have been applied:
EN60079-0:2009, EN60079-1:2007, EN60079-18: 2009 & EN 60079-31: 2009.
• This apparatus is equipment category 2 / EPL Gb & Db and may be installed in zone 1 and 2 areas. It may not be
used in a zone 0 area. This apparatus is certified for gas and dust hazards.
• The apparatus certification is valid for the ambient and process temperature range combinations listed on the
following page. This is not the operational temperature range of the apparatus - check supplied documentation
for operational limits.
• Field wiring and cable entry fittings shall be rated at least 10° above ambient. Cable entries are 3/4” NPT, see
product markings. ATEX approved (Ex d IIC and/or Ex tb IIIC) cable entry devices, appropriately rated, are
required. These must be installed according to the manufacturer's instructions. Unused entries must be closed
with an approved (Ex d IIC and/or Ex tb IIIC) plug. Connecting cables shall be mounted securely and protected
from mechanical damage, pulling and twisting.
• The product contains no exposed parts which produce high surface temperatures or infrared, electromagnetic
or ionizing radiation. The product must not be subjected to mechanical or thermal stresses in excess of those
permitted in the certification documentation and the instruction manual. The metal part of the transducer body
and the enclosure shall not be insulated.
• There are no internal sources of ignition in normal operation.
• The product is a hazardous area electrical apparatus and must be installed in accordance with the
requirements of the product certification. The installation must be carried out in accordance with all the
appropriate international, national and local regulations, codes of practice and site requirements for hazardous
area apparatus and in accordance with the instructions contained in the manual. The installation shall comply
with IEC / EN 60079-14.
• To avoid an ignition hazard, protect the transducer from impact or friction. In particular, the transducer must be
installed so that the face of the transducer is towards the process, protecting the face from impact.
• The apparatus must be securely attached to the site of the flow measurement. The transducer assembly must
be attached to the pipe as detailed in the user manual. For horizontal pipe runs, the transducers shall be
mounted in the horizontal plane. The transducer shall not be mounted on top of the pipe. All NPT joints shall be
made up wrench tight, suggested minimum torque is 40 lbf-ft / 54 N.m. Before installation, check that the
transducer and enclosure are firmly locked together. Measures must be taken to ensure a good electrical
contact and to prevent the threads from self-loosening. An inspection of the joint should be added to the routine
maintenance schedule.
• To avoid electrical shock, the transducer must be mounted to a metal, electrically grounded, pipe system.
• A cable lug shall be used for all connections to the enclosure's earth points.
• Each enclosure cover is fitted with a locking device. This device must be loosened before opening the cover. It
must be tightened after the cover is replaced so as to preserve the protection provided by the enclosure. Access
to the circuitry must not be made during operation; the apparatus should be de-energized before opening.
Modifications to the flameproof enclosure are not permitted.
• Only trained, competent personnel may install, operate and maintain the equipment. The product cannot be
repaired by the user; it must be replaced by an equivalent certified product. Repairs should only be carried out
by the manufacturer or by an approved repairer.
Special Conditions for Safe Use
• To avoid an ignition hazard, protect the transducer from impact or friction. In particular, the transducer must be
installed so that the face of the transducer is towards the process, protecting the face from impact.
• The transducer must be protected by limiting the maximum fault current. This is achieved by operating the
apparatus in conjunction with the following meters: XMT868(i), DF868, AT868, CG868 or CTF878. Only these
meters are permitted under the certificate detailed below.