SGM Functions

• Ground Impedance - Can be used on an existing energized or de-energized grounding system. Measures ground impedance with all other connections present. Result is ground impedance at 60 Hz (magnitude and phase) and any user selected frequency range.
  
• Touch Voltage - Measures actual touch voltage at the site as a function of the available fault current (required as input). Performs measurements at up to six points anywhere near the grounding system
  
• Step Voltage - Measures actual step voltage at the site as a function of the available fault current (required as input). Performs measurements at user selected points anywhere near the grounding system.
  
• Soil Resistivity - Takes simultaneous measurements on nine probes placed at equal spacing along a line in the soil. Based on an extension of the four pin method. Output is a two layer soil resistivity model and includes expected error versus confidence level.
  
• Tower Ground Resistance - Can be used on an existing energized or de-energized power line tower with the shield wire(s) connected or disconnected. Output includes tower ground resistance and expected error versus confidence level.
  
• Ground Mat Impedance - Can be used on an existing energized or de-energized substation or other grounding structure. Shield wires and neutrals may be connected to the ground mat under test. The result is ground mat impedance as a function of frequency in a user selected frequency range.
  
• Transfer Voltage - Measures the transfer voltage at a user selected structure near the grounding system under test as a function of the available fault current. The result is the actual transfer voltage to the structure under test.
  
• Low Impedance/Continuity - Measures the actual impedance between any two user selected points (of a grounding system, neutral, etc.) under normal operating conditions, i.e., substantial external electromagnetic noise. This function requires the Calibration and Test Kit for operation.