Potential Equalisation; Degree Of Protection - Endress+Hauser Proline Prosonic Flow 90 Operating Instructions Manual

4 Wiring
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40
4.3

Potential equalisation

For potential equalisation no special measures are necessary.
Note!
For instruments for use in hazardous areas, observe the corresponding guidelines in the specific
Ex documentation.
4.4

Degree of protection

Transmitter (wallmount housing)
The transmitter fulfills all the requirements for IP 67 degree of protection. Compliance with the
following points is mandatory following installation in the field or servicing, in order to ensure that
IP 67 protection is maintained:
• The housing seals must be clean and undamaged when inserted into their grooves. The seals must
be dried, cleaned or replaced if necessary.
• All threaded fasteners and screw covers must be firmly tightened.
• The cables used for connection must be of the specified outside diameter (see Page 97).
• Firmly tighten the cable entries (Fig. 38).
• Remove all unused cable entries and insert dummy plugs instead.
• Do not remove the grommet from the cable entry.
Fig. 38: Installation instructions for cable entries on the transmitter housing
Flowrate measuring sensors W/P (clamp-on / Insertion)
The flowrate measuring sensors W/P, depending on the type, fulfill all the requirements for IP 67
or 68 degree of protection (please observe the informations on the nameplate of the sensor).
Compliance with the following points is mandatory following installation in the field or servicing,
in order to ensure that IP 67/68 protection is maintained:
• Only use cables supplied by Endress+Hauser with the corresponding sensor connectors.
• The cable connector seals (1) must be clean, dry and undamaged when inserted in the seal groove.
Replace them if necessary.
• Insert the cable connectors, do not cant and then tighten them to the stop.
Fig. 39: Installation instructions for IP 67/68 degree of protection for sensor connectors
1
Proline Prosonic Flow 90
A0001138
A0001139
Endress+Hauser