2 Safety
2.1 Intended use
The pH/redox process assembly UniFit H
CPA 441 is intended for applications where
the components in contact with medium must
be steam-sterilised. Typical areas of application
are fermenters, food industry, highly pasty
media and media with very low conductivity.
The assembly consists of a built-in part and
a vessel filled with liquid electrolyte. The cap
of the electrolyte vessel contains the thread
which will hold the electrode, a manometer
and a screw coupling for the compressed-air
connection. This quick-release coupling also
serves as opening for refilling the electrolyte.
It is not necessary to remove the assembly or
the electrode to refill. The pressure may be
applied by compressed air or a manual pump.
It is the operator’s responsibility to assure that
the following safety regulations are observed:
•Regulations for explosion protection
•Regulations for installation
•Operating conditions for the device and its
materials
•Local standards and regulations.
2.2 General safety notes
The assembly CPA 441 has been designed
for safe operation according to the state of the
art in engineering and according to current
regulations and European standards (see
Technical data).
However, if used improperly or other than for
the intended purpose, it may be dangerous,
e.g. due to incorrect installation or incorrect
operating conditions.
Warning:
•Operating this assembly in any
way other than described in these
instructions may compromise
the safety and function of the
measuring system.
•The notes and warnings in these
operating instructions must be
strictly adhered to.
2.3 Installation, start-up, operation
Warning:
•This device may only be installed,
connected electrically,
commissioned, operated and
serviced by properly trained
personnel authorised by the
system operator.
•The personnel must be familiar
with these operating instructions
and must adhere to the
instructions contained therein.
•When this assembly is used in an
explosive atmosphere, adherence
to the applicable regulations is
mandatory.
•Check that all connections have
been properly made before
powering up the system.
•Damaged assemblies that may be
dangerous must not be operated
and should be clearly identified as
being defective.
•Any troubleshooting of the
measuring system must be
performed exclusively by
authorised, trained personnel.
•If faults cannot be remedied, the
assembly must be removed from
service and secured to prevent
accidental start-up.
•Repairs not described in these
operating instructions may only
be performed directly at the
manufacturer’s works or by
the Endress+Hauser service
organisation.
Safety UniFit H CPA 441
4Endress+Hauser
