| diagnostic device used to provide clear evidence of the presence or absence of an operating voltage|
Note 1 to entry: These diagnostic devices are generally described as either capacitive type or resistive type.
Note 2 to entry: Clear evidence is a YES or NO indication with no interpretation needed. Sometimes, voltage detectors also have supplementary function(s) such as the display of voltage values.
Note 3 to entry: This entry was numbered 651-10-04 in IEC 60050-651:1999. It has been modified as follows: Greater details are provided regarding the objective and description of the device.