IM 01C25C01-01E
2-11
2. HANDLING CAUTIONS
Note 3. Operation
• WARNING:
AFTER DE-ENERGIZING, DELAY 5 MINUTES
BEFORE OPENING.
• WARNING:
WHEN AMBIENT TEMPERATURE
≥
65
°
C,
USE THE HEAT-RESISTING CABLES
≥
90
°
C.
• Take care not to generate mechanical sparking
when accessing to the instrument and peripheral
devices in a hazardous location.
Note 4. Maintenance and Repair
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation is prohibited and
will void IECEx Certification.
2.10 EMC Conformity Standards
EN61326, AS/NZS CISPR11
CAUTION
To meet EMC regulations, Yokogawa recom-
mends that customers run signal wiring through
metal conduits or use shielded twisted-pair
cabling when installing EJX series transmitters in
a plant.
2.11 Pressure Equipment
Directive (PED)
(1) General
• EJX series pressure transmitters are categorized as
pressure accessories under the vessel section of
directive 97/23/EC, which corresponds to Article 3,
Paragraph 3 of PED, denoted as Sound Engineering
Practice (SEP).
(2) Technical Data
Article 3, Paragraph 3 of PED, denoted as Sound
Engineering Practice (SEP).
(3) Operation
CAUTION
• The temperature and pressure of fluid should
be maintained at levels that are consistent with
normal operating conditions.
• The ambient temperature should be maintained
at a level that is consistent with normal
operating conditions.
• Please take care to prevent water hammer and
the like from inducing excessive pressures in
pipes and valves. If phenomena are likely,
install a safety valve or take some other
appropriate measure to prevent pressure from
exceeding PS.
• Take appropriate measures at the device or
system level to protect transmitters if they are
to be operated near an external heat source.
2.12 Low Voltage Directive
Applicable standard : EN61010-1
(1) Pollution Degree 2
"Pollution degree" describes the degree to which a
soild, liquid, or gas which deteriorates dielectric
strength or surface resistivity is adhering. " 2 "
applies to normal indoor atmosphere. Normally,
only non-conductive pollution occurs. Occasionally,
however, temporary conductivity caused by
condenstaion must be expected.
(2) Installation Category I
"Overvoltage category(Installation category)"
describes a number which defines a transient
overvoltage condition. It implies the regulattion for
impulse withstand voltage. " I " applies to electrical
equipment which is supplied from the circuit when
appropriate transient overvoltage control means
(interfaces) are provided.
