Hach si792 D series, User Manual

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General Information
13
2.2 General product information
2.2.1 Product overview
The si792 D and si792x D transmitters are used for continuous
dissolved oxygen and temperature measurement. Applications include
biotechnology, chemical, pharmaceutical and food processing as well
as environmental monitoring and sewage treatment. This manual
describes the installation, operation and maintenance for standard and
EU models of the si792 D series transmitters.
The transmitter accepts various amperometric sensors, for example:
• Hamilton Oxysens, Oxyferm, Oxygold G
The molded transmitter enclosure can be attached to a panel, wall, post
or pipe railing. The optional hood (see
Accessories on page 85
)
provides protection against direct weather exposure and mechanical
damage.
Three communication options are available for the si792 transmitter:
• 4–20 mA/HART—si792 D and si792x D (si792(x) D)
• Foundation Fieldbus—si792x D-FF
• Profibus PA—si792x PD-PA
This user manual includes instructions for all three protocols.
Important Note: An ‘x’ in the model number is an indication of an
instrinsically safe (IS) instrument.
2.2.2 FDA 21 CFR part 11 Compliance (HART only)
In the directive “Title 21 Code of Federal Regulations, 21 CFR Part 11,
Electronic Records; Electronic Signatures“ the US American health
agency FDA (Food and Drug Administration) regulates the production
and processing of electronic documents for pharmaceutical
development and production. The features described in
section 2.2.2.1
and
section 2.2.2.2
make the transmitter compliant with the
requirements of FDA 21 CFR Part 11.