KROHNE OPTIFLEX 4300C ATEX EN - Manual (Page 5)

GENERAL SAFETY INFORMATION
1
5
OPTIFLEX 4300 C
www.krohne.com 02/2009 - 4000523601 - AD ATEX OPTIFLEX 4300 R01 en
1.4 Device categories
This device is suitable for use in potentially explosive atmospheres of all flammable substances
in Gas Groups IIA, IIB and IIC. It is certified for applications requiring Category 1 G (gases,
vapours or mists), 1 D (dust), 1/2 G, 1/2 D, 2 G or 2 D equipment when fitted with the appropriate
Ex ia options. It is certified for applications requiring Category 1/2 G, 1/2 D, 2 G or 2 D equipment
when fitted with the appropriate Ex d options.
1.5 ATEX nameplates
INFORMATION!
Category 1
Category 1 Category 1 Category 1
The device is installed in hazardous areas requiring Category 1 G or 1 D equipment.
Category 1/2
Category 1/2 Category 1/2 Category 1/2
The signal converter is installed in hazardous areas requiring Category 2 G or 2 D equipment.
The probe is installed in hazardous areas requiring Category 1 G or 1 D equipment.
Category 2
Category 2 Category 2 Category 2
The device is installed in hazardous areas requiring Category 2 G or 2 D equipment.
Figure 1-1: Ex ia nameplate (device without external sensor)
1 ATEX certification agency code. Refer also to temperature classes temperature classes temperature classes temperature classes.
2 Equipment approval categories
3 Types of device protection including approved Gas Groups (IIA, IIB or IIC) and temperature classes for hazardous areas
and maximum surface temperature (please refer to the certificate)
4 Intrinsically-safe circuit data
5 Cable entry type and size (Aluminium housing: M26 x 1.5, M20 x 1.5, ½NPT or G½; Stainless steel housing: M25 x 1.5,
M20 x 1.5, ½NPT or G½)
AD_ATEX_OPTIFLEX4300_en_090528_4000523601_R01_D5D.book Page 5 Thursday, May 28, 2009 6:00 PM