Owner's manual
<2. Installation, Wiring and Piping>
2-2
IM 11T3E1-01E
2.1.2 GD40T (FM Explosion-proof and Intrinsically Safe
Approval)
Sealing Fitting
Conduit
475 mm (18") Max.
NON-HAZARDOUS
LOCATIONS
HAZARDOUS
LOCATIONS
GD40T
F0201.ai
Figure 2.1
1. GD40T Gas density detector for use in hazardous (classied) locations:
• Explosion-proof for Class I, Division 1, Groups B, C and D;
Dust Ignition-proof for Class II, III, Division 1, Groups E, F and G with Intrinsically
Safe sensor for Class I, II, III, Division 1, Groups B, C, D, E, F and G.
• Enclosure Rating: NEMA 4X
• Temperature Code: T5
• Ambient Temperature: -10 to 60°C
2. Wiring
• All wiring shall comply with National Electric Code ANSI/NAPA 70 and Local Electrical
Codes.
WARNING
Seal all conduits within 475 mm (18 inches). Refer to Figure 2.1.
3. Operation
• Note a warning label worded as follows.
WARNING
Open circuit before removing cover.
• Take care not to generate mechanical spark when access to the instrument and
peripheral devices in hazardous locations.
4. Maintenance and Repair
• The instrument modication or parts replacement by other than authorized representative
of Yokogawa Electric Corporation is prohibited and will void the approval of Factory
Mutual Research Corporation.