Yokogawa EJX930A - Manual (Page 28)

<3. Handling Cautions>
3-11
IM 01C25R01-01E
3.11 Pressure Equipment
Directive (PED)
(1) General
• EJX series pressure transmitters are
categorized as piping under the pressure
accessories section of directive 97/23/EC,
which corresponds to Article 3, Paragraph 3 of
PED, denoted as Sound Engineering Practice
(SEP).
• EJX910A-M, EJX910A-H, EJX930A-M,
and EJX930A-H can be used above 200
bar and therefore considered as a part of a
pressure retaining vessel where category III,
Module H applies. These models with option
code /PE3 conform to that category.
(2) Technical Data
• Models without /PE3
Article 3, Paragraph 3 of PED, denoted as
Sound Engineering Practice (SEP).
• Models with /PE3
Module: H
Type of Equipmen: Pressure Accessory-Vessel
Type of fluid: Liquid and Gas
Group of fluid: 1 and 2
Model
Capsule
code
PS* 1
(bar) V(L)
PS.V
(bar.L) Category
* 2
EJX910A
L 160 0.01 1.6 Article 3,
Paragraph 3
(SEP) M, H 250 0.01 2.5
EJX910A
with code
/PE3
M, H 250 0.01 2.5 III
EJX930A M, H 500 0.01 5.0
Article 3,
Paragraph 3
(SEP)
EJX930A
with code
/PE3
M, H 500 0.01 5.0 III
*1: PS is maximum pressure for vessel itself based on
Pressure Equipment Directive 97/23/EC.
Refer to General specification for maximum working
pressure of a transmitter.
*2: Referred to Table 1 covered by ANNEX II of EC Directive
on Pressure Equipment Directive 97/23/EC
(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.
3.12 Low Voltage Directive
Applicable standard: EN61010-1
(1) Pollution Degree 2
“Pollution degree” describes the degree to
which a solid, 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.