Table of Figures
Figure 1: Electric Field Mill at Ground Level
...........................................................................3
Figure 2: Intensification of Electric Field
.................................................................................3
Figure 3: Field Mill Block Diagram
..........................................................................................4
Figure 4: EFM-100 Connection Diagram
..................................................................................5
Figure 5: A poor choice of mounting locations
.........................................................................8
Figure 6: An excellent choice of mounting locations
................................................................8
Figure 7: EPM-1 Power Module Connectors
............................................................................9
Figure 8: EPM-1 Voltmeter Connections –Differential (Preferred Connection)
....................10
Figure 9: EPM-1 Voltmeter Connections –Single Ended
.......................................................10
Figure 10: EFA-10 Fiber Optic Adapter
..................................................................................11
Figure 11: Female Fiber Optic Connector
...............................................................................11
Figure 12: Male Fiber Optic Connector
..................................................................................12
Figure 13: EFM-100 Field Mill Connections
...........................................................................12
Figure 14: Sensitivity Plugs
.....................................................................................................13
Figure 15: Correcting a Field Mill using a Reference Field Mill
.............................................14
Figure 16: Field Mill Grounding Detail
...................................................................................16
Figure 17: EFM Options –General
.........................................................................................17
Figure 18: EFM Options –High Field Alarm
.........................................................................19
Figure 19: EFM Options –Very High Field Alarm
.................................................................20
Figure 20: EFM Options –Lightning Alarm
..........................................................................22
Figure 21: EFM Options –Data Logging
...............................................................................23
Figure 22: EFM Options –Data Sharing
................................................................................24
Figure 23: EFM-100 Software Display
.....................................................................................27
Figure 24: Approaching Thundercloud
...................................................................................29
Figure 25: Increasing Field due to Approaching Thundercloud
............................................29
Figure 26: Thundercloud Directly Overhead
..........................................................................30
Figure 27: Electric Field Polarity Reversal
..............................................................................30
Figure 28: Departing Thundercloud
.......................................................................................31
Figure 29: End of Storm Oscillation
.......................................................................................31
Figure 30:
Step Changes in Field Magnitude Indicate Lightning
...........................................32
Figure 31: Precipitation Noise
................................................................................................32
Figure 32: Field Mill Cleaning
.................................................................................................33
