KROHNE OPTISOUND 3010-3020 Ex DE - Manual (Page 17)

English
4. Application conditions
The max. permissible ambient temperatures in dependence of the temperature class can be taken
from the following charts:
Category 1 G instruments
T-class T6 T5 T4,T3,T2,T1
Max. permissible
ambient temperature
on the transducer and
electronics
-20°C... + 41°C
-20°C... + 53°C
-20°C... + 60°C
The 80% consideration of EN1127-1, sect. 6.4.2 is taken into account with the permissible ambient
temperatures on the sensor and electronics.
Category 1/2 G instruments
T-class T6 T5 T4,T3,T2,T1
Max. permissible
ambient temperature on
the transducer
-20°C... + 58°C
-20°C... + 60°C
-20°C... + 60°C
Max. permissible
ambient temperature on
the electronics
-40°C... + 57°C
-40°C... + 72°C
-40°C... + 85°C
The application conditions in hazardous atmospheres without explosive mixtures are
mentioned in the operating instructions.
Category 2 G instruments
T-class T6 T5 T4,T3,T2,T1
Max. permissible
ambient temperature on
the sensor
-20°C... +74°C
-20°C... +89°C
-20°C... +90°C
Max. permissible
ambient temperature on
the electronics
-40°C... +57°C
-40°C... +72°C
-40°C... +85°C
Permissible operating pressure
For applications in hazardous atmospheres requiring instruments of category 1 G or 1/2 G:
0,8 ...1,1 bar
The application conditions in non-hazardous atmospheres and hazardous atmospheres, requiring
instruments of category 2 G, are mentioned in the operating instructions.
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