IM 01C25R03-01E
2-1
2. HANDLING CAUTIONS
2.
HANDLING CAUTIONS
2.1 Installation of an Explosion-
Protected Instrument
If a customer makes a repair or modification 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 modification to an instrument.
CAUTION
This instrument has been tested and certified 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 equip-
ment 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.
2.1.1 FM approval
a. FM Explosionproof Type
Caution for FM Explosionproof type
Note 1. EJX910A multivariable transmitters with
optional code /FF1 is applicable for use in
hazardous locations:
• 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 4X.
• Temperature Class: T6
• Ambient Temperature: –40 to 60
°
C
• 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 RE-
QUIRED.”
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 modification or parts
replacement by other than authorized
representative of Yokogawa Electric Corpo-
ration is prohibited and will void Factory
Mutual Explosionproof Approval.
