Endress+Hauser Proline Promag H 300, Техническая информация

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Proline Promag H 300
Hauser 33
Connection example, standard scenario
Metal process connections
Potential equalization is generally via the metal process connections that are in contact with the
medium and mounted directly on the sensor. Therefore there is generally no need for additional
potential equalization measures.
Connection example in special situations
Plastic process connections
In the case of plastic process connections, additional grounding rings or process connections with an
integrated grounding electrode must be used to ensure potential matching between the sensor and
the fluid. If there is no potential matching, this can affect the measuring accuracy or cause the
destruction of the sensor as a result of the electrochemical decomposition of the electrodes.
Note the following when using grounding rings:
• Depending on the option ordered, plastic disks are used instead of grounding rings on some
process connections. These plastic disks only act as "spacers" and do not have any potential
matching function. Furthermore, they also perform a significant sealing function at the sensor/
connection interface. Therefore, in the case of process connections without metal grounding rings,
these plastic disks/seals should never be removed and should always be installed!
• Grounding rings can be ordered separately as an accessory from Hauser . When ordering
make sure that the grounding rings are compatible with the material used for the electrodes, as
otherwise there is the danger that the electrodes could be destroyed by electrochemical corrosion!
• Grounding rings, including seals, are mounted inside the process connections. Therefore the
installation length is not affected.
Potential equalization via additional grounding ring
1
3 2
4
2
A0028971
1 Hexagonal-headed bolts of process connection
2 O-ring seals
3 Plastic disk (spacer) or grounding ring
4 Sensor