Introduction - YOKOGAWA DY025 User Manual

INTRODUCTION

The DY series of vortex flowmeters have been fine-tuned to
your order specifications prior to shipment. Before use, read
this manual thoroughly and familiarize yourself fully with
the features, operations and handling of digitalYEWFLO to
have the instrument deliver its full capabilities and to ensure
its efficient and correct use.
■ Notices Regarding This Manual
• This manual should be passed to the end user.
• The contents of this manual are subject to change without
prior notice.
• All rights reserved. No part of this document may be
reproduced or transmitted in any form or by any means
without the written permission of Yokogawa Electric
Corporation (hereinafter simply referred to as Yokogawa).
• This manual neither does warrant the marketability of this
instrument nor it does warrant that the instrument will suit
a particular purpose of the user.
• Every effort has been made to ensure accuracy in the
contents of this manual. However, should any questions
arise or errors come to your attention, please contact your
nearest Yokogawa sales office that appears on the back of
this manual or the sales representative from which you
purchased the product.
• This manual is not intended for models with custom
specifications.
• Revisions may not always be made in this manual in
conjunction with changes in specifications, constructions
and/or components if such changes are not deemed to
interfere with the instrument's functionality or perfor-
mance.
■ Notices Regarding Safety and Modification
• For the protection and safety of personnel, the instrument
and the system comprising the instrument, be sure to
follow the instructions on safety described in this manual
when handling the product. If you handle the instrument
in a manner contrary to these instructions, Yokogawa
does not guarantee safety.
• If this instrument is used in a manner not specified in this
manual, the protection provided by this instrument may
be impaired.
• As for explosionproof model, if you yourself repair or
modify the instrument and then fail to return it to its
original form, the explosion-protected construction of the
instrument will be impaired, creating a hazardous
condition. Be sure to consult Yokogawa for repairs and
modifications.
■ Safety and Modification Precautions
• The following general safety precautions must be
observed during all phases of operation, service, and
repair of this instrument. Failure to comply with these
precautions or with specific WARNINGS given elsewhere
in this manual violates safety standards of design,
manufacture, and intended use of the instrument.
Yokogawa assumes no liability for the customer's failure
to comply with these requirements. If this instrument is
used in a manner not specified in this manual, the
protection provided by this instrument may be impaired.
• The following safety symbol marks are used in this user's
manual and instrument.
WARNING
A WARNING sign denotes a hazard. It calls attention
to procedure, practice, condition or the like, which, if
not correctly performed or adhered to, could result in
injury or death of personnel.
CAUTION
A CAUTION sign denotes a hazard. It calls attention
to procedure, practice, condition or the like, which, if
not correctly performed or adhered to, could result in
damage to or destruction of part or all of the product.
IMPORTANT
An IMPORTANT sign denotes that attention is
required to avoid damage to the instrument or system
failure.
NOTE
A NOTE sign denotes information necessary for
essential understanding of operation and fea-
tures.
Functional grounding terminal
Direct current
iv
INTRODUCTION
IM 01F06A00-01E