SICK FLOWSIC600-XT - Page 61

Installation
FLOWSIC600-XT · Operating Instructions · 8018846/1BHP/V2-1/2021-05 · © SICK Engineering GmbH 61
Subject to change without notice
Fig. 27 Ex zones
Additional requirements for operation of ultrasonic transducers in Zone 0 classified
areas
FLOWSIC600-XT is either available in the completely intrinsically safe variant and is
identified with device protection level Ga after the temperature class or the identification
contains, among others [ia Ga], which identifies the intrinsically safe control of the
ultrasonic transducers.
Operation of ultrasonic transducers in Zone 0
The ultrasonic transducers are suitable for operation in Zone 0 at atmospheric conditions,
i.e. ambient temperature -40 °C to 70 °C and ambient pressure 0.8 bar to 1.1 bar(a).
If ultrasonic transducers with titanium housing are to be used in Zone 0, it must be assured
that the medium does not transport solid parts (like dust or other particles) which could
cause an ignition hazard. Otherwise, transducers made from stainless steel must be used.
Non-Ex zone
Case 1:
● The pipeline contains a non-explosive
mixture. The gas mixture can be
combustible.
● Gas pressure and gas temperature may
be within the range specified by the tag
on the meter body.
Case 2:
● The area inside the pipeline is classified
as potentially explosive atmosphere Zone
1 or 2.
● Gas pressure must be in the range from
80 kPa (0.8 bar) to 110 kPa (1.1 bar)
(normal atmospheric conditions).
● Gas temperature must be within the
permitted ambient temperature range
specified by the type plate on the Signal
Processing Unit.
Case 3:
● The area inside the pipeline is classified
as potentially explosive atmosphere in
Zone 0.
● Gas pressure must be in the range from
80 kPa (0.8 bar) to 110 kPa (1.1 bar)
(normal atmospheric conditions).
● Gas temperature must be within the
permitted ambient temperature range
specified by the type plate on the Signal
Processing Unit.
Zone 1 or 2
Zone 1 or 2
Zone 1 or 2
Zone 0
Zone 0 or 1 or 2