<2. Handling Cautions>
2-9
IM 01C25C01-01E
Note 4. Maintenance and Repair
•
The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric
Corporation and Yokogawa Corporation of
America is prohibited and will void Canadian
Standards Explosionproof Certification.
c CSA Intrinsically Safe Type/CSA
Explosionproof Type
EJX/EJA-E Series pressure transmitters with
optional code /CU1 or /V1U1 can be selected
the type of protection (CSA Intrinsically Safe
or CSA Explosionproof) for use in hazardous
locations.
Note 1. For the installation of this transmitter,
once a particular type of protection is
selected, any other type of protection
cannot be used. The installation must be in
accordance with the description about the
type of protection in this instruction manual.
Note 2. For combined approval types, once a
device of multiple approval type is installed,
it should not be re-installed using any
other approval types. Apply a permanent
mark in the check box of the selected
approval type on the certification label on
the transmitter to distinguish it from unused
approval types.
2.9.3 ATEX Certification
(1) Technical Data
a. ATEX Intrinsically Safe Ex ia
Caution for ATEX Intrinsically safe type.
Note 1. EJX/EJA-E Series pressure transmitters
with optional code /KS21 for use in
hazardous locations:
• Applicable standards:
EN IEC 60079-0, EN 60079-11
• Certificate number: DEKRA 11ATEX0228 X
• Specific Ex marking:
II 1 G
Ex ia IIC T4 Ga
II 2 D
Ex ia IIIC T85°C T100°C T120°C Db
• Ambient temperature:
EPL Ga
–50°C ≤ Ta ≤ +60°C
EPL Db
–30°C ≤ Ta ≤ +60°C
EPL Db *
–15°C ≤ Ta ≤ +60°C
• Process temperature:
EPL Ga
–50°C ≤ Tp ≤ +120°C
EPL Db T120°C
–30°C ≤ Tp ≤ +120°C
T100°C
–30°C ≤ Tp ≤ +100°C
T85°C
–30°C ≤ Tp ≤ +80°C
EPL Db * T120°C
–15°C ≤ Tp ≤ +120°C
T100°C
–15°C ≤ Tp ≤ +100°C
T85°C
–15°C ≤ Tp ≤ +80°C
* When FKM O-rings are used. ( /HE is specified.)
• Enclosure: IP66/IP67 in accordance with
EN IEC 60079-0
•
Power supply: ≤ 30 V, ≤ 21.6 mA
• Dielectric strength:
500 V AC, r.m.s.,
1 min
Terminals:
Supply –
to Enclosure
Note 2. Specific condition of use
When the equipment is mounted in an area
where the use of Category 1 G equipment is
required, it shall be installed in such a way that,
even in the event of rare incidents, an ignition
source due to impact and/or friction sparks is
excluded.
Precaution shall be taken to minimize the risk
from electrostatic discharges or propagating
brush discharges on the non-metallic parts
(excluding glass parts) or coated parts of the
equipment.
The dielectric strength of at least 500 V of the
intrinsically safe circuits of the equipment is
limited only by the overvoltage protection. From
the safety point of view, the intrinsically safe
circuit of the equipment shall be assumed to be
connected to earth.
Note 3. Installation and erection
Cable entry devices suitable for the thread
form and the size of the cable entries must be
used, according to the following marking on the
equipment.
F0218.ai
Screw Size
Marking
ISO M20 × 1.5 female
ANSI 1/2 NPT female
M
A or
W
N or
When installing the equipment, the selected
Type of Protection should be ticked as follows.
Ex ia IIC T4 Ga
Ex ia IIIC T85°C T100°C T120°C Db
See the control drawing.
