Frequency Selective Multimeter: Model 4025E

The 4025E is the latest revision in our 4025 series of frequency selective
multi-meters. It maintains all of the features of the previous models for
measuring the I/V magnitudes and phase of signals induced into an earth
loop via high power current injection.

The 4025E has been designed with better step resolution allowing for
measurement of injection frequencies to 0.1 Hz off main line frequency
without interference.
Designed to be used with our new GPS based injection products, it takes
full advantage of the GPS features to synchronize with the injection system and provide the operator with cable free current phase referencing and a visual display of the operator’s relative position to the other injection points
during large earth system potential measurements.

The 4025E runs off an internal rechargeable battery with a
7 to 8 hour field time before requiring re-charge.