Unpacking; Storage; Selecting The Installation Location; Pressure Connection - YOKOGAWA DPharp EJXC80A User Manual

2.2

Unpacking

Keep the transmitter in its original packaging to
prevent it from being damaged during shipment.
Do not unpack the transmitter until it reaches the
installation site.
2.3

Storage

The following precautions must be observed when
storing the instrument, especially for a long period.
(a) Select a storage area which meets the following
conditions:
• It is not exposed to rain or subject to water
seepage/leaks.
• Vibration and shock are kept to a minimum.
• It has an ambient temperature and relative
humidity within the following ranges.
Ambient temperature:
–40* to 85°C without integral indicator
–30* to 80°C with integral indicator
* –15°C when /HE is specified.
Relative humidity:
0% to 100% R.H. (at 40°C)
Preferred temperature and humidity:
approx. 25°C and 65% R.H.
(b) When storing the transmitter, repack it carefully
in the packaging that it was originally shipped
with.
(c) If the transmitter has been used, thoroughly
clean the chambers inside the cover flanges
and the diaphragm surface of high pressure-
detector section, so that there is no process
fluid remaining inside or on it. Before placing it
in storage, also make sure that the pressure-
detector section is securely connected to the
transmitter section.
2.4 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.
<2. Handling Cautions>
(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 transmitter is
certified for installation in a hazardous area
containing specific gas types. See subsection
2.9 "Installation of an Explosion-Protected
Transmitters" of each transmitter's manual as of
table 1.1.
2.5

Pressure Connection

WARNING
• Never loosen the flange 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.
• Since the accumulated process fluid may be
toxic or otherwise harmful, take appropriate
steps to prevent the contact of such fluids
with the skin or eyes and the inhalation
of vapors from these fluids even after
dismounting the instrument from process line
for maintenance.
The following precautions must be observed
in order to safely operate the transmitter under
pressure.
(a) Make sure that all 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.
2-2
IM 01C25W01-01EN