Important Information
FLOWSIC100 Flare · Operating Instructions · 8013344/11L2/V 2-5/2018-10 · © SICK Engineering GmbH 17
Subject to change without notice
1.3.3 Restrictions of use
The ultrasonic transducers/probes are preferably intended for installation in gas-carrying
pipelines. It is not absolutely necessary that atmospheric conditions prevail within the
pipeline. The pipe wall is then a zone-separating wall, i.e. no Ex zone is defined within the
pipeline, at least temporarily.
WARNING: Pressure/temperature hazard
Use the measuring system only within the pressure and temperature limits
specified in these Operating Instructions and on the device type plate. The
selected materials must be resistant to the process gases.
WARNING: Dangerous voltage
● With the use of sender/receiver units FLSE100-EXS and EXPR zone 1 the
rated voltage U
M
used in the safe area may not exceed 125 V. Higher volt-
ages can jeopardize intrinsic safety of the ultrasonic transducer circuit
when errors occur.
Ensure that the rated voltage U
M
used in the safe area does not exceed
125 V.
● The FLOWSIC100 Flare is not equipped with a power switch.
Plan and install a suitable switching off device.
WARNING: Leakage hazard
Operation with leakage is not permitted.
● The metallic and hermetically sealed, fully welded housing and the seal
must comply with all safety requirements which must also be fulfilled by the
pipeline itself with respect to design pressure and temperature and compat
-
ibility of the material with the medium.
● The ultrasonic transducers with their gas-tight and pressure-proof housings
must be installed in the pipeline gas-tight and pressure-tight. Depending on
the design, at least one seal with an O-ring according to DIN 3771 or a stan
-
dardized sealing flange must be provided.
● The sealing itself must consist of material which is compatible with the
medium and is suitable for the application conditions.
Check the sealing surfaces and elements for intactness before
installation.
Check the sealing effect with suitable methods after installation.
Regularly check leak-tightness during operation and replace the seal, as
required.
● The sealing effect must be checked with suitable methods after installation
and every removing and re-installation. Leak-tightness is to be checked reg
-
ularly during operation and the seal replaced, as required. Before every re-
installation new seals have to be used in the required design.
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