CiDRA Sonar Process Monitoring System - Manual (Page 10)

3
ATEX ZONE 2 SPECIAL CONDITIONS OF USE
RELATED TO THE SYMBOL “X”
These Conditions of Use are those specifically identified by certain
clauses in standards EN60079-0:2006 and EN 60079-15:2005 and
are linked to the DEMKO certificate via the suffix “X” in the certificate
number (DEMKO 07 ATEX 0608105X).
3.1 Transient Protection
Provision shall be made external to the apparatus to prevent the rated
voltage being exceeded by transient disturbance of more than 40%.
3.2 Electrostatic Charging
The non-metallic materials the transmitter and the sensor head
enclosures are constructed from have a high enough surface
resistivity that there is a risk of the generation of electrostatic sparks
from rubbing those enclosures during operations such as cleaning.
Such sparks could potentially ignite explosive gas atmospheres if they
were present.
To mitigate this risk, the transmitter and sensor head enclosures
should not be rubbed except with a clean rag dampened with water or
a water-based cleanser (non-flammable solvent). The dampened rag
will reduce the generation of charges from rubbing and facilitate the
discharging of surface charges that may be generated.
3.3 Cable Glands
Cable glands to be ATEX approved for Group II or Group IIC gasses,
have at least IP55 rating, be sized for the cable and mounting hole
where installed, and have temperature rating of at least -20ºC to
+57ºC.
3.4 Control Drawings
Installation shall be per Control Drawing 20907-01C for complete
system (TB8-xx-xx-xx-03 Transmitter used with SH-xxx-xx-xA-xxx-03
Sensor Head) or per Control Drawing 20908-01C for the TB8-xx-xx-
xx-04 Transmitter.
3.5 Environment
This equipment will be used in an area not more than Pollution Degree
2 as defined by IEC 60664-1.
20909-01C Rev 04 Page 3-1