IM 01E20D01-01E
8-8
8. EXPLOSION PROTECTED TYPE INSTRUMENT
(Remote Flowtube)
IECEx Flameproof Type
Ex demb [ia] IIC T6...T3
Electrode Circuit Um: 250 Vac/dc
Excitation Circuit: 170V max
Enclosure: IP66, IP67
Temperature Class:
T0813.EPS
Temperature
Class
–40°C to +85°C (–40°F to +185°F)
–40°C to +150°C (–40°F to +302°F)
–40°C to +120°C (–40°F to +248°F)
–40°C to +70°C (–40°F to +158°F)T6
Process Temperature
T4
T5
T3
Ambient Temp.:
PFA Lining; –40˚C to +60˚C (–40˚F to +140˚F)
Ceramics Lining; –15˚C to +60˚C (+5˚F to +140˚F)
IECEx Type of Protection "Dust"
Ex tD A21 IP6x T95˚C, T105˚C, T120˚C, T135˚C
Electrode Circuit Um: 250 Vac/dc
Excitation Circuit: 170V max
Enclosure: IP66, IP67
Maximum surface temperature:
T0814.EPS
Maximum Surface
Temperature
–40°C to +85°C (–40°F to +185°F)
–40°C to +150°C (–40°F to +302°F)
–40°C to +120°C (–40°F to +248°F)
–40°C to +70°C (–40°F to +158°F)T95°C (+203°F)
Process Temperature
T120°C (+248°F)
T105°C (+221°F)
T135°C (+275°F)
Ambient Temp.:
PFA Lining; –40˚C to +60˚C (–40˚F to +140˚F)
Ceramics Lining; –15˚C to +60˚C (+5˚F to +140˚F)
(2) Installation
WARNING
• All wiring shall comply with local installation
requirements and local electrical code.
• In hazardous locations, the cable entry devices
shall be of a certified IECEx flameproof type,
suitable for the conditions of use and correctly
installed.
• Unused apertures shall be closed with suitable
flameproof certified blanking elements. (The
plug attached is certified as the flameproof and
IP66 or IP67 as a part of this apparatus.)
• In case of ANSI 1/2 NPT plug, ANSI hexagonal
wrench should be applied to screw in.
(3) Operation
(Integral Flowmeter)
WARNING
• After de-energizing, delay 20 minutes before
opening.
• Take care not to generate mechanical spark
when access to the instrument and peripheral
devices in hazardous locations.
(Remote Flowtube)
WARNING
• De-energize before opening.
• Take care not to generate mechanical spark
when access to the instrument and peripheral
devices in hazardous locations.
(4) Maintenance and Repair
WARNING
The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation is prohibited and
will void the certification.
8.5 TIIS
CAUTION
The model AXFC magnetic flowmeter with
optional code JF3, which has obtained
certification according to technical criteria for
explosion-protected construction of electric
machinery and equipment (Standards
Notification No. 556 from the Japanese Ministry
of Labor) conforming to IEC standards, is
designed for hazardous areas where
inflammable gases or vapors may be present.
(This allows installation in Division 1 and 2
areas)
To preserve the safety of flameproof equipment
requires great care during mounting, wiring, and
piping. Safety requirements also place
restrictions on maintenance and repair activities.
Users absolutely must read “INSTALLATION
AND OPERATING PRECAUTIONS FOR TIIS
FLAMEPROOF EQUIPMENT” at the end of this
manual.
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