Yokogawa YTA320 - Manual (Page 4)

<. Preface>
-
IM 01C50B01-01E
. Preface
The YTA temperature transmitter is fully factory-
tested according to the specifications indicated on
the order.
In order for the YTA temperature transmitter to
be fully functional and to operate in an efficient
manner, the manual must be carefully read to
become familiar with the functions, operation, and
handling of the YTA.
This manual gives instructions on handling, wiring
and maintenance of YTA110, YTA310 and YTA320
temperature transmitters. Changing the parameter
settings requires a terminal dedicated to the HART
protocol or the BRAIN protocol. For details on how
to set the parameters of these transmitters, refer to
the “BRAIN Protocol” IM 0lC50T03-01E or “HART
Protocol” IM 01C50T01-01E.
For FOUNDATION Fieldbus communication type,
please refer to IM 01C50T02-01E in addition to this
manual.
■ Notes on the User’s Manual
• This manual should be delivered to the end
user.
• The information contained in this manual is
subject to change without prior notice.
• The information contained in this manual, in
whole or part, shall not be transcribed or copied
without notice.
• In no case does this manual guarantee
the merchant ability of the transmitter or its
adaptability to a specific client need.
• Should any doubt or error be found in this
manual, submit inquiries to your local dealer.
• No special specifications are contained in this
manual.
• Changes to specifications, structure, and
components used may not lead to the revision
of this manual unless such changes affect the
function and performance of the transmitter.
■ Notes on Safety and Modifications
• Before handling the YTA, it is absolutely
imperative that users of this equipment read
and observe the safety instructions mentioned
in each section of the manual in order to ensure
the protection and safety of operators, the YTA
itself and the system containing the transmitter.
We are not liable for any accidents arising out of
handling that does not adhere to the guidelines
established in the safety instructions.
• No maintenance should be performed on
explosionproof type temperature transmitters
while the equipment is energized. If
maintenance is required with the cover open,
always first use a gas detector to check that no
explosive gases are present.
• If the user attempts to repair or modify an
explosionproof type transmitter and is unable
to restore it to its original condition, damage to
the explosionproof features result, leading to
dangerous conditions. Contact your authorized
Yokogawa Electric Corporation representative
for repairs or modifications of an explosionproof
type transmitter.
■ For Safe Use of Product
Please give your attention to the followings.
(a) Installation
• The instrument must be installed by an expert
engineer or a skilled personnel. The procedures
described about INSTALLATION are not
permitted for operators.
• In case of high process temperature, care
should be taken not to burn yourself because
the surface of the case reaches a high
temperature.
• All installation shall comply with local installation
requirement and local electrical code.
(b) Wiring
• The instrument must be installed by an expert
engineer or a skilled personnel. The procedures
described about WIRING are not permitted for
operators.
• Please confirm that voltages between the
power supply and the instrument before
connecting the power cables and that the
cables are not powered before connecting.
(c) Maintenance
• Please do not carry out except being written
to a maintenance descriptions. When these
procedures are needed, please contact nearest
YOKOGAWA office.
• Care should be taken to prevent the build up of
drift, dust or other material on the display glass
and name plate. In case of its maintenance, soft
and dry cloth is used.