User guide

1 GENERAL SAFETY INFORMATION
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OPTIFLEX 4300 C
www.krohne.com 02/2009 - 4000523601 - AD ATEX OPTIFLEX 4300 R01 en
Figure 1-2: Ex ia nameplate (device with external sensor)
Figure 1-3: Ex d[ia] nameplate
1 ATEX certification agency code. Refer also to temperature classes
temperature classestemperature 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 Maximum voltage in accordance with EN 60079-0
6 Minimum waiting time after power-off before it is safe to open the terminal compartment
7 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 6 Thursday, May 28, 2009 6:00 PM