8 emc conformity standards, 9 low voltage directive, Emc conformity standards -3 – Yokogawa YTA320 User Manual
Page 19: Low voltage directive -3
<2. Notes on Handling>
2-3
IM 01C50B01-01E
Note 5. Maintenance and Repair
• The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric
Corporation is prohibited and will void IECEx
Flameproof Certification.
2.8 EMC Conformity Standards
EN61326-1 Class A, Table 2 (For use in industrial
locations)
EN61326-2-3
NOTE
YOKOGAWA recommends customer to apply
the Metal Conduit Wiring or to use the twisted
pair Shield Cable for signal wiring to conform the
requirement of EMC Regulation, when customer
installs the YTA Series Transmitters to the plant.
2.9 Low Voltage Directive
Applicable standard: EN61010-1
() 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 condensation
must be expected.
(2) Installation Category I
“Overvoltage category(Installation category)”
describes a number which defines a transient
overvoltage condition. It implies the regulation
for impulse withstand voltage. “ I ” applies to
electrical equipment which is supplied from the
circuit when appropriate transient overvoltage
control means (interfaces) are provided.