Fluid Components International CMF Series Manual Installation of Flow Element User Manual
Page 9
Installation of sensor
FlexCOR
™
Model CMF Series
30
Fluid Components Intl
Document 06EN003327 Rev. -
Transmitters
The instrument can be used in a 19" rack version where the sensor can be installed in the ex-area.
The transmitter must be installed in a safe area or as compact (integral) Ex-d version for installation
in the ex-area.
For mounting in Ex areas
Approval EEx [ia] llC T4...T6. DEMKO No. 95D.117700X
19” Ex for mounting in safe areas
Approval EEx [ia/ib] m llB T4...T6. DEMKO No. 99E.125729X.
Ex-d system
Approval Ex de [ia] llC T4...T6. DEMKO No. 99E.124212X.
Marking
The marking has the following meaning according to European Norm EN 50014.
E:
Certified to CENELEC standard.
Ex:
Designates explosion proof material and indicates that the apparatus has been
approved in accordance with a certificate issued.
i:
“Intrinsic safety” is a protection ensuring that the energy in the electric circuit is too small to ignite
the explosive atmosphere. There are two categories of intrinsic safety: “ia” and “ib”.
ia:
In intrinsic safety category “ia”, the circuit must remain safe, even in the event of two
simultaneous errors occurring that are independent of one another.
ib:
In intrinsic safety category “ib” the circuit must remain safe if one error occurs.
d:
The enclosure of the of the signal converter is so strong that it can resist an explosion in-
side the enclosure. The enclosure is dimensioned in a way so that an explosion will not
effect the surroundings.
e:
“Increased safety” is a constructional safeguard which ensures the apparatus does not
contain normally arcing or sparking devices, or hot surfaces that will cause ignition.
ll:
Designates that the apparatus may be used in all areas (except mining).
B:
Indicates the gas group in which the unit may be used.
T4...T6 The temperature class describes the maximum temperature which any exposed surface
of the equipment may reach. The sensor can have temperature class T3, T4, T5 or T6
depending on the temperature of the media. Please see technical data for the sensor.
T3: Max. surface temperature 392°F (200 °C) => (Max. media temperature 356°F (180 °C))
T4: Max. surface temperature 275°F (135 °C) => (Max. media temperature 248°F (120 °C))
T5: Max. surface temperature 212°F (100 °C) => (Max. media temperature 194°F (90 °C))
T6: Max. surface temperature 185°F (85 °C) => (Max. media temperature 167°F (75 °C))
4.18
Ex installations