KROHNE OPTIWAVE 7300 IECEx - Manual (Page 5)

GENERAL SAFETY INFORMATION
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OPTIWAVE 7300 C
www.krohne.com 10/2010 - 4000176502 - AD IECEX OPTIWAVE7300 R02 en
1.4 Equipment protection levels (EPL)
1.4.1 Ex ia / Ex iaD-approved devices
These devices are suitable for use in potentially explosive atmospheres of all flammable
substances in Gas Groups IIA, IIB and IIC. The Ex ia-approved device is certified for applications
for which an EPL of Ga, Ga/Gb or Gb is necessary. The Ex iaD-approved device is certified for
zone 20, zone 21/20 or zone 21 (combustible dust atmospheres).
1.4.2 Ex d[ia] / Ex tD[iaD]-approved devices
These devices are suitable for use in potentially explosive atmospheres of all flammable
substances in Gas Groups IIA, IIB and IIC. The Ex d[ia]-approved device is certified for
applications for which an EPL of Ga/Gb or Gb is necessary. The Ex tD[iaD]-approved device is
certified for applications in zone 21/20 or zone 21 (combustible dust atmospheres).
1.4.3 Definitions of equipment protection levels
EPL Ga EPL Ga EPL Ga EPL Ga
The device is installed in hazardous areas that must have equipment with a very high level of
protection. The device is not a source of ignition in usual conditions of operation or when
possible or unusual faults occur.
EPL Gb EPL Gb EPL Gb EPL Gb
The device is installed in hazardous areas that must have equipment with a high level of
protection. The device is not a source of ignition in usual conditions of operation or when
possible faults occur. It is possible that this does not include frequent faults.
EPL Ga/Gb EPL Ga/Gb EPL Ga/Gb EPL Ga/Gb
The signal converter is installed in hazardous areas that must have equipment with a high level
of protection. The antenna is installed in hazardous areas that must have equipment with a very
high level of protection.
DANGER!
The device must be fitted with the appropriate options.
DANGER!
The device must be fitted with the appropriate options.