IM 01C50B01-01E
1-1
1. PREFACE
1. 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 instruction manual must be carefully read to
become familiar with the functions, operation, and
handling of the YTA.
This Instruction 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 Instruction 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 perfor-
mance 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 contain-
ing 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 explosion-
proof 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 Safety Using
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.
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