<2. Handling Cautions>
2-2
IM 01C25W05-01EN
2.3 Storage
The following precautions must be observed when
storing the instrument, especially for a long period.
(1) 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. Room
temperature and humidity (around 25°C, 65%)
are preferred.
Temperature:
–40 to 85°C without integral indicator
–30 to 80°C with integral indicator
or a temperature range defined by various
specifications
Humidity: 0 to 100%RH
(2) When storing the transmitter, repack it carefully
in the packaging that it was originally shipped
with.
(3) If the transmitter has been used, thoroughly
clean the diaphragm surface (pressure-detector
section), so that there is no process fluid
remaining on them.
Before placing it in storage, also make sure that
the pressure-detector 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.
Ambient Temperature
Avoid locations subject to wide temperature
variations or a significant temperature gradient. If
the location is exposed to direct sunlight or radiant
heat from plant equipment, provide adequate
shade, thermal insulation and/or ventilation.
Also, avoid locations subject to prolonged high
temperature and high humidity.
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.
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.
Installation of Explosion-protected
Transmitters
An explosion-protected transmitters is certified for
installation in a hazardous area containing specific
gas types.
2.5
Pressure Connection
WARNING
• 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. Avoid draining or releasing
gas while the instrument is running as doing
so will disturb the measured pressure.
• On models with diaphragm seals, never
loosen the process 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.
The following precautions must be observed
in order to safely operate the transmitter under
pressure.
(1) Make sure that there are no leaks in the impulse
piping or process connections.
(2) Make sure that the transmitter process
connections are securely fastened.
(3) Never apply a pressure higher than the
specified maximum working pressure.
