Model And Specifications Check; Selecting The Installation Location; Pressure Connection; Installation Of An Explosion-Protected Instrument - YOKOGAWA EJX Series User Manual

2.1 Model and Specifications
Check
The model name and specifications are indicated on the
name plate attached to the case.
Figure 2.2 Name Plate
2.2 Selecting the Installation
Location
The transmitter is designed to withstand severe
environmental conditions. However, to ensure that it will
provide years of stable and accurate performance, take
the following precautions when selecting the installation
location.
(a) Ambient Temperature
Avoid locations subject to wide temperature variations
or a significant temperature gradient. If the location is
exposed to radiant heat from plant equipment, provide
adequate thermal insulation and/or ventilation.
(b) Ambient Atmosphere
Do not install the transmitter in a corrosive
atmosphere. If this cannot be avoided, there must be
adequate ventilation as well as measures to prevent
the leaking of rain water and the presence of standing
water in the conduits.
(c) Shock and Vibration
Although the transmitter is designed to be relatively
resistant to shock and vibration, an installation site
should be selected where this is kept to a minimum.
(d) Installation of Explosion-protected Transmitters
An explosion-protected transmitters is certified for
installation in a hazardous area containing specific
gas types. See subsection 2.4 "Installation of an
Explosion-Protected Instrument."
2.3 Pressure Connection
WARNING
• Never loosen the process connector bolts when an
instrument is installed in a process. The device is
under pressure, and a loss of seal can result in a
sudden and uncontrolled release of process fluid.
• When draining toxic process fluids that have
condensed inside the pressure detector, take
appropriate steps to prevent the contact of such
fluids with the skin or eyes and the inhalation of
vapors from these fluids.
F0203.ai
<2. Handling Cautions>
The following precautions must be observed in order to
safely operate the transmitter under pressure.
(a) Make sure that the process connector bolts are
tightened firmly.
(b) Make sure that there are no leaks in the impulse
piping.
(c) Never apply a pressure higher than the specified
maximum working pressure.
2.4 Installation of an Explosion-
Protected Instrument
NOTE
For F Fieldbus and PROFIBUS PA explosion
oundation
protected type, please refer to manual in the attached
CD-ROM.
If a customer makes a repair or modification to an
intrinsically safe or explosionproof instrument and the
instrument is not restored to its original condition, its
intrinsically safe or explosionproof construction may be
compromised and the instrument may be hazardous to
operate. Please contact Yokogawa before making any
repair or modification to an instrument.
CAUTION
This instrument has been tested and certified as
being intrinsically safe or explosionproof. Please
note that severe restrictions apply to this instrument's
construction, installation, external wiring, maintenance
and repair. A failure to abide by these restrictions could
make the instrument a hazard to operate.
WARNING
Maintaining the safety of explosionproof equipment
requires great care during mounting, wiring, and
piping. Safety requirements also place restrictions on
maintenance and repair. Please read the following
sections very carefully.
WARNING
The range setting switch must not be used in a
hazardous area.
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IM 01C25A01-01E