CiDRA Sonar Process Monitoring System - Manual (Page 8)

2
MARKINGS
The following explains the hazardous area markings that can be found
on the equipment.
2.1 Transmitter [TB8-xx-xx-xx-03] for use with Sensor Head
[SH-xxx-xx-xA-xxx-03]:
II 3 G Ex nA nL [nL] IIC T4 -20C<=T
amb
<=+57C IP55
DEMKO 07 ATEX 0608105X
This particular model of transmitter can be installed in a safe area or
an area that is classified as an Equipment Group II (not in mines),
explosive gas (not explosive dusts or fibers), ATEX Zone 2 location
with any of the explosive gas groups, including the most explosive
group, IIC. Its enclosure has been tested to IP55 (the second-to-
highest dust rating and the rating for low-pressure water jets). It is
intended for an operating ambient air temperature range of -20 ºC to
+57 ºC. If installed properly, it will not produce a hot-spot temperature
in excess of 135 ºC during normal operation.
The transmitter includes certain energy-limited interfaces (see list to
determine which interfaces are energy-limited) that allow wires from
these interfaces to be routed in Zone 2 areas with a reduced
possibility of explosion. This, for example, permits the convenience of
being able to disconnect the sensor head cable connector from the
sensor head cover with the power ON with a reduced risk of
generating a spark with sufficient energy to trigger an explosion if an
explosive atmosphere happens to be present.
Note: In Zone 2, explosive atmospheres are not expected to be
present except under fault conditions. If the operator is aware that a
fault condition exists at the facility that makes it likely that an explosive
atmosphere is present, then extra caution is indicated.
2.2 Sensor Head [SH-xxx-xx-xA-xxx-03]:
-40C<=T
amb
<=+100C IP55
ONLY TO BE USED WITH TRANSMITTER TB8-xx-xx-xx-03
FOR ATEX MARKING SEE LABEL ON TB8 TRANSMITTER
This particular model of sensor head can be installed in a safe area or
an area that is classified as an Equipment Group II (not in mines),
explosive gas (not explosive dusts or fibers), ATEX Zone 2 location
with any of the explosive gas groups, including the most explosive
group, IIC. Its enclosure has been tested to IP55 (the second-to-
highest dust rating and the rating for low-pressure water jets). It is
intended for an operating ambient air temperature range of –40 ºC to
+100 ºC.
20909-01C Rev 04 Page 2-1