Troubleshooting guide

37
Reference Manual
00809-0100-4308, Rev BA
Section 3: Installation
December 2014
Installation
3.7 Ground the device
The Rosemount 3308 Series Wireless Guided Wave Radar transmitter operates with the housing
grounded or floating. Floating systems can cause extra noise that may affect many types of
readout devices. If the signal appears noisy or erratic, grounding at a single point may solve the
problem.
Grounding of the electronics enclosure should be done in accordance with local and national
installation codes. Grounding is accomplished by using the external case grounding terminal.
Non-metallic tanks
Ground device on non-metallic tanks (e.g. fiberglass tanks) to prevent electrostatic charge
build-up.
There is one grounding screw connection provided, located on the housing, see Figure 3-17.
The ground screw is identified by a ground symbol:
Figure 3-17. Ground Screw
Note
Always use facility recommended wiring practices.
Note
Flexible twin lead probe or coaxial probe are the recommended choice for non-metallic tanks.
Single lead probes are not suited for non-metallic tanks or open atmosphere applications, due
to high susceptibility to strong electromagnetic fields.
Ground screw