Endress+Hauser Flowmeter Proline 300 Brief Operating Instructions page 25

Flowmeter Proline 300
 5 Potential equalization via ground terminal and ground disks (PE = P
1. Connect the ground disks to the ground terminal via the ground cable.
2. Connect the ground disks to ground potential.
 PE = P
FL
Pipe with a cathodic protection unit
This connection method is only used if the following two conditions are met:
• Metal pipe without liner or pipe with electrically conductive liner
• Cathodic protection is integrated in the personal protection equipment
Ground cable
Prerequisite: The sensor is installed in the pipe in a way that provides electrical insulation.
1. Connect the two flanges of the pipe to one another via a ground cable.
2. Connect the flange to the ground terminal via the ground cable.
3. Route the signal line shielding via a capacitor (recommended value 1.5 µF/50 V).
4. Connect the device to the power supply such that it is floating in relation to the ground
potential (PE), (this step is not necessary if using a power supply without ground
potential (PE)).
 PE ≠ P
FL
Endress+Hauser
= P
M
Copper wire, at least 6 mm
4.
3.
= P
M
2 2
(0.0093 in )
+
–
Electrical connection
= P )
FL M
2.
A0029339
A0029340
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