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IM 1F6A0-01E
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INTRODUCTION
■
For Safety Using
For safety using the instrument, please give attention
mentioned below.
WARNING
(1) Installation
• The instrument must be installed by expert engineer or
skilled personnel. The procedures described about
INSTALLATION are not permitted for operators.
• The Vortex Flowmeter is a heavy instrument. Please give
attention to prevent that persons are injured by carrying or
installing. It is preferable for carrying the instrument to
use a cart and be done by two or more persons.
• In case of high process temperature, care should be taken
not to burn yourself because the surface of body and case
reach a high temperature.
• If the process fluid is harmuful to personnel, handle
digitalYEWFLO carefully even after it has been removed
from the process line for maintenance or other purposes.
Exercise extreme care to prevent the fluid from coming
into contact with human flesh and to avoid inhaling any
residual gas.
• When carrying digtalYEWFLO around, exercise extreme
care to avoid dropping it accidentally and causing bodily
injury.
• When removeing the instrument from hazardous
processes, avoid to contact with the fluid and the interior
of the flowmeter.
• All installation shall comply with local installation
requirement and local electrical code.
(2)Wiring
• The instrument must be installed by expert engineer or
skilled personnel. The procedures described about
WIRING are not permitted for operators.
• Please confirm voltages between the power supply and
the instrument before connecting the power cables. And
also, please confirm that the cables are not powered
before connecting.
• The protective grounding must be connected to the
terminal
in order to avoid personal shock hazard.
(3)Operation
• Wait 10 min.after power is turned off, before opening the
covers.
• Although the transmitter has been designed to resist high
frequency electrical noise, if a radio transceiver is used
near the transmitter or it external wiring, the transmitter
may be affected by high frequency noise pickup. To test
for such effects, bring the transceiver in use slowly from a
distance of several meters from the transmitter, and
observe the measurement loop for noise effects.
Thereafter, always use the transceiver outside the area
affected by noise.
(4)Maintenance
• Please do not carry out except being written to a
maintenance descriptions. When these procedures are
needed, please contact to nearest YOKOGAWA office.
• Care should be taken to prevent the build up of drift, dust
or other material on the display glass and data plate. In
case of its maintenance, soft and dry cloth is used.
(5)Explosion Protected Type Instrument
• For explosion proof type instrument, the description in
Chapter 9 “EXPLOSION PROTECTED TYPE
INSTRUMENT” is prior to the other description in this
user’s manual.
• Only trained persons use this instrument in the industiral
location.
• The protective grounding
must be connected to a
suitable is grounding system.
• Take care not to generate mechanical spark when access
to the instrument and peripheral device in hazardous
locations.
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