Endress+Hauser Flowmeter Proline 500, Краткое руководство по эксплуатации

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Flowmeter Proline 500 Electrical connection
Hauser 33
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.
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