KROHNE OPTITEMP TCA Ex EN - Manual (Page 8)

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DEVICE DESCRIPTION
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OPTITEMP TRA/TCA
www.krohne.com 10/2010 - 4001087001 - Ex AD OPTITEMP TRA/TCA R02 en
2.5 Equipment category
Industrial thermometers are designed for use in zone 0 in category II 1 G, for use in zone 20 in
category II 1 D. In category II 1/2 G all thermometers have a separator (thermowell) which
separates zone 0 and zone 1.
For more information see the chapter entitled "Flammable products".
For further information refer to Flammable products on page 7.
INFORMATION!
Definition of Zone 0 according to EN 1127-1:
An area with a constant or long-term or frequent explosive atmosphere made up of a mixture of
flammable substances in the form of gas, vapours or mist.
INFORMATION!
Definition of Zone 20 according to EN 61241-0:
An area with a constant or long-term or frequent explosive atmosphere in the form of a cloud of
flammable dust in air.
INFORMATION!
Definition of a device with separator as per EN 60079-26:
Devices which are installed in the wall to an area requiring EPL Ga or which are part of this wall
and contain electrical circuits which do not meet the requirements of the Ga protection level,
must, at minimum, comply with one of the protection types that an EPL Gb offers. In addition,
they must feature an integrated mechanical separator to separate the device's electrical circuits
from the area requiring EPL Ga.
.book Page 8 Friday, November 19, 2010 2:23 PM