The Measurement Systems of the Hiresta Series works with ring electrode probes. The probes have a concentric ring
electrode. Due to the small size of flowing current, a higher measuring voltage up to 1000V is needed. Low currents can
be falsified very easy by external influences and leak currents, so a special guard technic is used. For that technic a
third connection between measuring equipment and measuring object is required. This additional connection has ground
potential and ensures a common reference potential for shielding, without falsify the current measurement. The outer
electrode works as the guard electrode and the current passed through the exterior of the detection electrode (the inner
electrode) flows to the ground. Hiresta-UX can display the RCF by selecting the surface and volume directions and a
probe type.