IM 01E20D01-01E
8-5
8. EXPLOSION PROTECTED TYPE INSTRUMENT
(4) Operation
WARNING
• “OPEN CIRCUIT BEFORE REMOVING COV-
ERS.”
• “SEALS ALL CONDUITS WITHIN 18 INCHES”
in hazardous locations.
• When installed in Division 2, “SEALS NOT
REQUIRED”
• Take care not to generate mechanical spark
when access to the instrument and peripheral
devices in hazardous locations.
• In case the electrodes and/or grounding rings
are made of titanium, the flowtube should be
kept away from impacts and frictions in hazard-
ous locations.
(5) Maintenance and Repair
WARNING
• The instrument modification or parts replace-
ment by other than authorized representative of
Yokogawa Electric Corporation is prohibited
and will void the approval of Factory Mutual
Research Corporation.
• In case the electrodes and/or grounding rings
are made of titanium, the flowtube should be
kept away from impacts and frictions in hazard-
ous locations.
Conduit
Magnetic Flowmeter
Sealing Fitting
HAZARDOUS LOCATIONS
18" (457 mm) Max.
F0805.EPS
Figure 8.2 Conduit Wiring
8.3 CSA
(1) Technical Data
*AXF002C – AXF400C
Applicable Standard:
For CSA C22.2 Series;
C22.2 No 0, C22.2 No 0.4, C22.2 No 0.5,
C22.2 No 25, C22.2 No 30, C22.2 No 94,
C22.2 No 157, C22.2 No.61010-1-12,
C22.2 No.61010-2-030-12
For CSA E79 Series;
CAN/CSA-E79-0, CAN/CSA-E79-1,
CAN/CSA-E79-7, CAN/CSA-E79-11,
CAN/CSA-E79-18
Certificate: 1481213
Process Sealing Certification:
Dual Seal certified by CSA to the requirements of
ANSI/ISA 12.27.01.
No additional sealing required.
Primary seal failure annunciation;
Deterioration of the flowrate output at nonzero
flow point.
Unstable flowrate output at zero flow point.
(Integral Flowmeter)
For CSA C22. 2 Series
Explosion proof for Class I, Division 1, Groups A,
B, C & D.
Dust-ignition proof for Class II/III, Division 1,
Groups E, F & G.
Intrinsically safe (electrodes) for Class I, Division 1,
Groups A, B, C & D.
“SEAL ALL CONDUITS WITHIN 50 cm OF THE
ENCLOSURE”
“WHEN INSTALLED IN DIV. 2, SEALS NOT
REQUIRED”
Electrode Circuit Um: 250 Vac/dc
Maximum power supply voltage: 250 Vac/130 Vdc
Excitation Circuit: 140V max
Enclosure: Type 4X
Temperature Code:
T0807.EPS
+70
°
C (+158
°
F)
+85
°
C (+185
°
F)
Temperature
Code
+120
°
C (+248
°
F)
Maximum Process
Temperature
–40
°
C (–40
°
F)
–40
°
C (–40
°
F)
–40
°
C (–40
°
F)
–40
°
C (–40
°
F)
T6
Minimum Process
Temperature
T4
T5
T3
+130
°
C (+266
°
F)
Ambient Temp.: –40
°
C to +60
°
C (–40
°
F to +140
°
F)
For CSA E79 Series
Flameproof for Zone 1, Ex dme [ia] IIC T6...T3
Intrinsically safe (electrodes), Ex ia IIC T6...T3
Electrode Circuit Um: 250 Vac/dc
Maximum power supply voltage: 250 Vac/130 Vdc
Excitation Circuit: 140V max
Enclosure: IP66, IP67
Temperature Code:
