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IM 1F6A0-01E
9-9
9. EXPLOSION PRTECTED TYPE INSTRUMENT
(Integral Type Flowmeter and Remote Type Flowmeter)
Temperature Class Ambient Temperature Process Temperature
T4
T3
T2
T1
60
°
C
60
°
C
60
°
C
60
°
C
135
°
C
200
°
C
300
°
C
450
°
C
T090401_2.EPS
Ambient Temperature: -29 to +60
C (Integral Type Flowmeter
and Remote Type Flowmeter)
-40 to +60
C (Remote Type Converter)
Ambient Humudity: 0 to 100%RH(No Condensation)
Degree of Protection of Enclosure: IP67
Electrical Parameters: Ui=30Vdc, Ii=165mAdc, Pi=0.9W
Ci=12nF, Li=0.15mH
Electrical Connection: ANSI 1/2 NPT female
Type of Protection: Intrinsically Safe for Class I,II,III, Div.1,
Groups A,B,C,D,E,F and G,
Non- incendive for Class I,II, DIV.2,
Groups A,B,C,D,E,F and G, Class III,
Div.1
(Integral Type Flowmeter and Remote Type Flowmeter)
Temperature Code Ambient Temperature Process Temperature
T4
T3
T2
T1
60
°
C
60
°
C
60
°
C
60
°
C
135
°
C
200
°
C
300
°
C
450
°
C
T090402.EPS
Temperature Code: T4 (Remote Type Converter)
Ambient Temperature: -40 to 60
C
Ambient Humidity: 0 to 100%RH (No Condensation)
Enclosure: Type 4X
Electrical Parameters: Vmax=30Vdc, Imax=165mAdc,
Pmax=0.9W, Ci=12nF, Li=0.15mH
9.4.2
Wiring
• Explosion proof
WARNING
• All wiring shall comply with Canadian Electrical
Code Part I and Local Electrical Codes.
• In Hazardous locations, wiring shall be in
conduit as shown in the figure.
• A SEAL SHALL BE INSTALLED WITHIN 50cm
OF THE ENCLOSURE.
• When the equipment is installed in Division 2,
“FACTORY SEALED, CONDUIT SEAL NOT
REQUIRED”.
9.4.3
Operation
• Explosion proof
WARNING
• Note a warning label worded as follows.
Warning: OPEN CIRCUIT BEFORE REMOV-
ING COVER.
• Take care not to generate mechanical spark
when access to the instrument and peripheral
devices in hazardous locations.
9.4.4
Maintenance and Repair
WARNING
• The instrument modification or part replace-
ments by other than authorized representatives
of Yokogawa Electric Corporation are prohibited
and will void CSA Certification.
9.4.5
Installation Diagram Intrinsically
Safe (and Note)
Intrinsically safe
[Remote type]
DYA (converter)
SUPPLY
PULSE
A
B
T (*1)
C
A
B
T
DY (flowmeter)
SUPPLY
PULSE
Safety barriers
Safety barriers
[Integral type]
DY-N (flowmeter)
Hazardous Location
Group IIC, Zone 0
Class I, II, III, Division 1,
Groups A, B, C, D, E, F and G
Non Hazardous
Location
DYC: Signal cable
(*1) Wire for T terminal
With temperature sensor type : installed
Without temperature sensor type: not installed