KROHNE OPTITEMP TT 50 C-R EN - Manual (Page 13)

INSTALLATION
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OPTITEMP TT 50 C/R
www.krohne.com 09/2010 - 4000636502 - MA OPTITEMP TT 50 C/R R03 en
DANGER!
Never install or operate the TT 50 C in potentially explosive areas, it might cause an explosion
that can result in fatal injuries! Only use the TT 50 C Ex in potentially explosive areas!
The Ex transmitter can be installed in potentially hazardous areas zone 0, 1 and 2. It must be
supplied by an intrinsically safe power supply unit or Zener barrier placed outside of the
potentially explosive zone.
The Ex transmitter must be installed in a housing with the protection rating IP20 or better
according to EN 60529 / IEC 60529.
CAUTION!
The TT 50 C / TT 50 C Ex temperature transmitter has been developed for an ambient
temperature of -40...+85°C / -40...+185°F. Please also note that the ambient temperature is also
dependent on the temperature category. For detailed information refer to Ex data of the ambient
temperature.
The process temperature is also transferred to the transmitter housing via the protective tube. If
the process temperature is close to or exceeds the maximum specified ambient temperature of
the transmitter, then the temperature in the transmitter housing can rise above the maximum
permissible ambient temperature. Always check that the ambient temperature does not exceed
the permissible range!
One way to decrease heat transfer via the protective tube is to make the protective tube longer or
in general to install the transmitter farther away from the heat source. The same safety
measures can be taken if the temperature is below the specified minimum temperature.
CAUTION!
The TT 50 C Ex may only be installed in a light metal housing, whose magnesium component
does not exceed 6%.
.book Page 13 Monday, September 13, 2010 5:07 PM