GENERAL SAFETY INFORMATION
1
5
OPTIWAVE X400
www.krohne.com
06/2021 - 4006413503 - AD NEPSI OPTIWAVE x400 R03 en
1.4 Equipment protection levels (EPL) and dust zones
1.4.1 Ex ia-approved devices
The Ex ia-approved device has the markings that follow for Gas Groups:
OPTIWAVE 5400 and OPTIWAVE 6400
PP Drop antenna and PP accessories
•
Ex ia IIC T5~T6 Ga/Gb
OPTIWAVE 5400 and OPTIWAVE 6400
All other versions
•
Ex ia IIC T4~T6 Ga/Gb
OPTIWAVE 7400
All versions
•
Ex ia IIC T3~T6 Ga/Gb
The Ex ia-approved 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
EPL Ga/Gb. All versions agree with temperature classes T6 thru T1 if the temperature limits are
obeyed. For more data, refer to
Ambient and process connection temperatures
on page 14.
INFORMATION!
EPL Ga/Gb equipment can be installed in:
•
the boundary wall between zone 0 and zone 1 (the antenna is in zone 0 and the signal
converter is in zone 1),
•
zone 1, or
•
zone 2
