Emerson Process Management ROSEMOUNT 5300 - Manual (Page 242)

Reference Manual
00809-0100-4530, Rev BA
July 2009
Rosemount 5300 Series
B-20
Flameproof
Figure B-22. Approval Labels
IECEx HART
E7 Flameproof
Ex iad IIC T4 (T
amb
:-40° C to +70 °C).
IECEx NEM 06.0001X.
U
m
=250 VAC
Conditions of Certification
The intrinsically safe circuits do not withstand the 500V AC test as specified in
EN 50020 clause 6.4.12.
Probes covered with plastic and/or with plastic discs will have a
non-conducting area that exceeds the maximum permissible area for Group
IIC accoring to IEC 60079-01 clause 7.3: 20 cm
2 for Zone 1 and 4 cm 2 for
Zone 0. Therefore, when the probe is used in a potentially explosive
atmosphere, appropriate measures must be taken to prevent electrostatic
discharge.
Impact and friction hazards need then to be considered according to IEC
60079-0 clause 8.1.2 when the transmitter exposed to the exterior
atmosphere of the tank is made with light metal alloys and used in Zone 0.