Hazardous duty type instrument – Yokogawa ADMAG CA User Manual

Page 8

IM 1E8B0-01E

13-1

13. HAZARDOUS DUTY TYPE INSTRUMENT

• In this section, further requirements and differences for explosion proof

type instrument are described. For explosion proof type instrument, the
description in this chapter is prior to other description in this Instruction
Manual.

• The terminal box cover and display cover are locked by special screw. In

case of opening the terminal box cover, please use the Hexagonal
Wrench attached.

• Be sure to lock the cover with the special screw using the Hexagonal

Wrench attached after tightening the cover.

13.1 FM (Only for sizes 15 to 100 mm (0.5 to 4 in))

(1) Technical Data

Optional code /FF11
Applicable Standard:

FM 3600, FM 3615, FM 3810, ANSI/NEMA 250

Explosion proof for Class I, Division 1, Groups A, B, C & D.
Dust-ignitionproof for Class II/III, Division 1, Groups E, F& G.
Temp. Code: T6
Ambient Temp.: –20

°C to +50°C (–4 to 122°F)

Maximum power supply voltage : 240 Vac/ 120 Vdc
Enclosure: TYPE 4X

(2) Installation

• Installation shall be in accordance with the manufacturer’s instructions and

the National Electric Code, ANSI/NFPA-70

• In hazardous locations, wiring to be in conduit as shown in the figure.

(3) Operation

• Open circuit before opening the covers and seal all conduits with in 18

inches in hazardous locations.

• Take care not to generate mechanical spark when access to the instru-

ment and peripheral devices in hazardous locations.

WARNING