Manual

<2. Handling Cautions>
2-1
IM 01C25R03-01E
2. Handling Cautions
2.1 Installation of an Explosion-
Protected Instrument
If a customer makes a repair or modication to
an intrinsically safe or explosionproof instrument
and the instrument is not restored to its original
condition, its intrinsically safe or explosionproof
construction may be compromised and the
instrument may be hazardous to operate. Please
contact Yokogawa before making any repair or
modication to an instrument.
CAUTION
This instrument has been tested and certied
as being intrinsically safe or explosionproof.
Please note that severe restrictions apply to this
instrument’s construction, installation, external
wiring, maintenance and repair. A failure to abide
by these restrictions could make the instrument a
hazard to operate.
WARNING
Maintaining the safety of explosionproof
equipment requires great care during mounting,
wiring, and piping. Safety requirements also
place restrictions on maintenance and repair.
Please read the following sections very carefully.
WARNING
The range setting switch must not be used in a
hazardous area.
IMPORTANT
All the blind plugs which accompany the EJX
transmitters upon shipment from the factory are
certied by the applicable agency in combination
with the EJX series transmitters. The plugs which
are marked with the symbols “◊ Ex” on their
surfaces are certied only in combination with
the EJX series transmitters.
2.1.1 FM approval
a. FM Explosionproof Type
Caution for FM Explosionproof type
Note 1. EJX multivariable transmitter with
optional code /FF1 is applicable for use in
hazardous locations:
• Applicable Standard: FM3600, FM3615,
FM3810, ANSI/NEMA 250
• Explosionproof for Class I, Division 1,
Groups B, C and D.
• Dust-ignitionproof for Class II/III, Division 1,
Groups E, F and G.
• Enclosure rating: NEMA TYPE 4X.
• Temperature Class: T6
• Ambient Temperature: –40 to 60ºC
• Supply Voltage: 32V dc max.
• Current Draw: 15 mA dc
Note 2. Wiring
• All wiring shall comply with National Electrical
Code ANSI/NFPA70 and Local Electrical
Codes.
• When installed in Division 1, “FACTORY
SEALED, CONDUIT SEAL NOT
REQUIRED.”
Note 3. Operation
• Keep the “WARNING” nameplate attached to
the transmitter.
WARNING: OPEN CIRCUIT BEFORE
REMOVING COVER. FACTORY SEALED,
CONDUIT SEAL NOT REQUIRED. INSTALL
IN ACCORDANCE WITH THE USERS
MANUAL IM 01C25.
• Take care not to generate mechanical
sparking when accessing the instrument and
peripheral devices in a hazardous location.
Note 4. Maintenance and Repair
• The instrument modication or parts
replacement by other than authorized
representative of Yokogawa Electric
Corporation is prohibited and will void
Factory Mutual Explosionproof Approval.