Boltek EFM-100 v.2 - Manual (Page 19)

C H A P T E R 2 - I N S T A L L A T I O N
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Figure 14: EFM-100 Field Mill Connections
Power Connector
Connect the black cable from the field mill’s power connector to the EPM-1 Power
Module’s field mill power connector. The cable supplies 12VDC to the field mill and
carries the analog output signals back to the EPM-1. See the Lightning Hazard caution in
the EPM-1 Analog Output section of this manual.
Fiber Optic Connector
Connect the orange fiber optic cable from the field mill’s fiber optic connector to the
EFA-10’s fiber optic connector. The fiber optic cable carries electric field data from the
field mill to the EFA-10 and ultimately to your computer. See the detailed drawings of the
fiber optic connector and note the keyway and locking tabs on the connectors. Orient the
key and locking slots properly on the male connector before attempting to insert the male
connector into the female connector.
Ground Connector
Connect the connector end of the green ground wire to the field mill ground connector.
The other end of the green ground wire connects to the field mill mount’s ground
connection. When mounting the field mill it is important to properly ground the field mill
and the field mill mount. The field mill is grounded through the green ground wire. The
field mill mounting hardware (mast and/or tripod) needs to be grounded though suitable
sized copper ground wire to your building central ground point. See Grounding Detail
for more information.