Vaisala FD12P - Manual (Page 34)

User's Guide _______________________________________________________________________
34 ______________________________________________________ M210296en-A
Internal Grounding
The electronics enclosure and the bottom plate of the FD12P are
secured by a 1.5-mm², yellow-green ground cable and the crossarm is
grounded through the transducer cable shield. The other parts of the
crossarm are in galvanic contact with each other.
CAUTION When installing the FD12P, the grounding flat connector must be
plugged to the ground terminal socket, which is located beside the
MIL-connector in the crossarm. See instructions in section
Assembling the FD12P on page 40 and Figure 10 on page 43.
Grounding for Testing Purposes
The FD12P is provided with a two-meter mains cable. The cable has a
grounded plug. The plug must be connected only to an outlet that has
a ground terminal. This grounding is sufficient when the instrument is
used indoors, for example, for testing purposes.
Grounding Remote Units and
Communication Cable
Remote units, such as, the PC data logger, must be grounded and
protected against lightning.
WARNING A lightning strike through a communication wire can cause a voltage
surge dangerous to life at remote sites if the remote units are not
properly grounded.