Yokogawa AXFA14G/C - Manual (Page 112)

IM 01E20C02-01E 12-1
12. EXPLOSION PROTECTED TYPE INSTRUMENT
12. EXPLOSION PROTECTED TYPE
INSTRUMENT
In this section, further requirements and differences for
explosion proof type instrument are described.
WARNING
• Magnetic flowmeters with the model name
AXFA14C are products which have been
certified as explosion proof type instruments.
Strict limitations are applied to the structures,
installation locations, external wiring work,
maintenance and repairs, etc. of these instru-
ments. Sufficient care must be taken, as any
violation of the limitations may cause danger-
ous situations.
Be sure to read this chapter before handling
the instruments.
For explosion proof type instrument, the de-
scription in this chapter is prior to other descrip-
tion in this user's manual.
For TIIS flameproof type instruments, be sure
to read “INSTALLATION AND OPERATING
PRECAUTIONS FOR TIIS FLAMEPROOF
EQUIPMENT” at the end of this manual.
WARNING
The terminal box cover and display cover is
locked by special screw. In case of opening the
cover, please use the hexagonal wrench at-
tached.
The covers of explosion proof type products are
locked. Use the attached hexagonal wrench to
open and close the cover. Before opening the
cover, be sure to check that the power of
flowmeter has been turned off. Once the cover is
closed, be sure to re-lock the product.
Be sure to lock the cover with the special screw
using the hexagonal wrench attached after
tightening the cover.
12.1 ATEX
WARNING
Only trained persons use this instrument in
industrial locations.
(1) Technical Data
Applicable Standard:
EN 50014: 1997, EN 50018: 2000,
EN 50281-1-1: 1998
Certificate: KEMA 03ATEX2435
ATEX Flameproof Type
Group: II
Category: 2G
EEx d IIC T6
Maximum power supply voltage: 250 Vac/130 Vdc
Excitation Circuit: 140V max
Enclosure: IP66, IP67
Ambient Temp.: –40
°C to +60°C (–40°F to +140°F)
ATEX Type of Protection “Dust”
Group: II
Category: 1D
Maximum power supply voltage: 250 Vac/130 Vdc
Excitation Circuit: 140V max
Enclosure: IP66, IP67
Maximum surface temperature: T75
°C (+167°F)
Ambient Temp.: –40
°C to +60°C (–40°F to +140°F)
(2) Electrical Connection
The type of electrical connection is stamped near the
electrical connection port accordiing to the following
codes.
Screw Size Marking
ISO M20x1.5 female M
ANSI 1/2NPT female A
F1201.EPS