Endress+Hauser Proline 800, Краткое руководство по эксплуатации

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Proline 800 Cellular radio Electrical connection
Hauser 35
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 optional 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
= P
M
Proline 800 - Advanced
In the case of remote device versions, the ground terminal in the example always refers
to the sensor and not to the transmitter.
5.9 Ensuring potential equalization
5.9.1 Introduction
Correct potential equalization (equipotential bonding) is a prerequisite for stable and reliable
flow measurement. Inadequate or incorrect potential equalization can result in device failure
and present a safety hazard.
The following requirements must be observed to ensure correct, trouble-free measurement:
• The principle that the medium, the sensor and the transmitter must be at the same
electrical potential applies.
• Take in-company grounding guidelines, materials and the grounding conditions and
potential conditions of the pipe into consideration.
• The necessary potential equalization connections must be established using a ground cable
with a minimum cross-section of 6 mm 2 (0.0093 in 2 ).
• For remote device versions, the ground terminal in the example always refers to the sensor
and not to the transmitter.
You can order accessories such as ground cables and ground disks directly from Endress
+Hauser
Abbreviations used
• PE (Protective Earth): potential at the protective earth terminals of the device
• P
P
(Potential Pipe): potential of the pipe, measured at the flanges
• P
M
(Potential Medium): potential of the medium
5.9.2 Connection examples for standard situations
Unlined and grounded metal pipe
• Potential equalization is via the measuring pipe.
• The medium is set to ground potential.
Starting conditions:
• Pipes are correctly grounded on both sides.
• Pipes are conductive and at the same electrical potential as the medium