Wiring Prosonic T
18 Endress+Hauser
4.4 Potential matching
L00-FMU30xxx-17-00-00-xx-014
1 External ground terminal of the device
Connect the equipotential bonding to the external ground terminal of the device.
"
Caution!
In Ex applications, the instrument must only be grounded on the sensor side. Further safety
instructions are given in the separate documentation for applications in explosion hazardous areas.
!
Note!
Since the housing is isolated from the tank by the plastic sensor, interference signals may occur if
the potential matchin gline is not prolerly connected.
For optimum electromagnetic compatibility the potential matching line should be as short as
possible and at least 2.5 mm
2
(14 AWG) in cross-section.
If increased electromagnetic interference is to be expected due to the installation conditions, we
recommend usage of a ground strap.
4.5 Checking the connection
After wiring the device, carry out the following checks:
• Are the terminals correctly assigned?
• Is the cable gland tight?
• Is the housing cover fully screwed on?
• If power supply available: Does a display appear on the display module?
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