Endress+Hauser Proline Promag Operating Instructions Manual page 27

Proline Promag
the destruction of the sensor as a result of the electrochemical decomposition of the
electrodes.
• 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/process 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 Endress+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.
 12 Installing grounding rings
1 Hexagonal-headed bolts of process connection
2 O-ring seals
3 Grounding ring or plastic disk (spacer)
4 Sensor
1. Release the 4 or 6 hexagonal-headed bolts (1) and remove the process connection from
the sensor (4).
2. Remove the plastic disk (3), along with the two O-ring seals (2), from the process
connection.
3. Place the first O-ring seal (2) back into the groove of the process connection.
4. Fit the metal grounding ring (3) in the process connection as illustrated.
5. Place the second O-ring seal (2) into the groove of the grounding ring.
Endress+Hauser
1
2
4
3
2
Installation
A0028971
27