Hach-Lange SI792 P, SI792x P, SI792x P-FF, SI792x P-PA User Manual - Manual (Page 15)

General information
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2.2 General product information
2.2.1 Product overview
The si792 P series transmitters are used for pH/ORP and temperature
measurement in industry, environment, food processing and sewage
treatment. This manual describes the installation, operation and
maintenance for standard and EU models of the si792 P series
transmitters.
The molded transmitter enclosure can be attached to a panel, wall, post
or pipe railing. The optional hood (see
Accessories on page 87 )
provides protection against direct weather exposure and
mechanical damage.
Three communication protocols are available for the si792 transmitter:
• 4–20 mA/HART—Models si792(x) P, includes the si792 P and
si792x P models
• Foundation Fieldbus—si792x P-FF
• Profibus PA—si792x P-PA
This user manual includes instructions for all three protocols.
Important Note: An ‘x’ in the model number is an indication of an
instriniscally 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.