Hach si792 T, Руководство пользователя, Страница: 15 / 116

General information
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2.2 General product information
DANGER
Explosion hazard. The Hach GLI 3700 series sensors can only be
used with the si792(x) E transmitter.
2.2.1 Product overview
The si792 T, si792x T, si792 E and si792x E transmitters are used for
measurement of electrical conductivity and temperature in liquids.
Fields of application are: biotechnology, chemical industry,
environment, food processing and water/waste-water treatment.
The E and the T models differ only in the types of sensors that can be
used with the transmitter. The operation of each version is identical.
This user manual refers to both versions as E/T.
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 E, si792 T, si792x E and si792x T (noted as
si792(x) E/T)
• Foundation Fieldbus—si792x E-FF and si792x T-FF
• Profibus PA—si792x E-PA and si792x T-PA
This user manual includes instructions for all three protocols.
Important Note: An ‘x’ in the model number is an indication of an
intrinsically safe (IS) instrument.
The instruments are compatible with different sensor types. See si792
transmitter versions on page 85 for a list of instrument versions.