Safety Precautions - Siemens ST-H Serie Betriebsanleitung

7. Repair of this equipment shall be carried out by suitably trained personnel in accordance
with the applicable code of practice (e.g. EN60079-19 within Europe).
8. Components to be incorporated into or used as replacements in the equipment shall be
fitted by suitably trained personnel in accordance with the manufacturer's
documentation.
9. The certification of this equipment relies upon the following materials used in its
construction:
• Norton Performance Plastics Chemgrip bonding compound
• Dupont Tefzel 210 housing material
• Elf Atochem Kynar Flex 2820 housing material
• Master Bond Polysulphide EP21LPT encapsulant
• Cotronics Durapot 861-F3 encapsulant
• Cotronics Durapot 864 encapsulant
If the equipment is likely to come into contact with aggressive substances, such as solvents
that may affect polymeric materials, it is the responsibility of the user to take suitable
precautions to prevent the equipment from being adversely affected. It is important to perform
routine inspections and establish from the materials data sheet that the transducer is resistant
to chemicals used in the application.

Safety Precautions

The ST-H transducer body is a two part design moulded in ETFE with internal parts potted in
epoxy. The joint between the upper and lower sections is not a hermetic seal. The structural
integrity of the transducer will be compromised if the joint is exposed to an environment that
attacks epoxy. As a result, the top section will separate from the main body of the transducer.
For environments that are compatible with ETFE but may degrade epoxy, the transducer must
be mounted through a flange or stub mount using the 2" thread on the lower section of the
transducer. The joint between upper and lower sections of the transducer must be isolated
from the corrosive environment.
NOTE:
Suitable for
use in a
corrosive
environment.
If the top section separates from the main body of the transducer, live circuitry
will be exposed to the hazardous environment, increasing the risk of an
explosion if volatile or explosive dusts or gases are in sufficient concentration.
A malfunction of the level system may also occur, which may affect the
process using the ultrasonic ranging system.
7ML19985QK81 ST-H Transducer – OPERATION MANUAL
WARNING:
NOT
suitable
for use in a
corrosive
environment.
Page EN-3