at a predetermined periodic interval or optionally the data acquisition device 12 may be configured to read each signal if the signal reaches or exceeds a predetermined threshold it is further contemplated that additional signals may be measured by suitable sensing devices 14 including but not limited to electric field strength temperature wind speed humidity rain fall amounts or other environmental variables that may affect the levels of stray voltage and leakage currents the sensing devices 14 may be positioned to measure signals at loads distributed about the monitoring location 10 at the connection to the utility grid or a combination thereof if the monitoring location 10 is for example a farm the loads distributed about the monitoring location may include but are not limited to fans pumps or specialized farm processing equipment requiring either single or multi phase power signals measured at the connection to the utility grid may include but are not limited to the voltages and or currents in one or more of the phases of electrical power entering the farm the data acquisition device 12 stores the digital signals on the memory device 62 the digital signals are preferably stored on the memory device 62 in data files suitable for importation into a spreadsheet or other graphing applications the memory device 62 is sized to store signals over a long period of time for example months or years optionally the data acquisition device 12 may be configured to periodically transmit stored data to a central processing device 30 or to copy the stored data to a removable storage medium 72 such as a cd rom dvd rom usb storage device or other such storage device once stored data has been transmitted or copied the.