PD Level Mode
In Level Mode, the magnitude and the repetition rate of the PD are displayed. The dB reading gives an indication of the magnitude of the PD activity detected.
The maximum PD detected is shown on the display. The reading can be restarted at any time by selecting ‘Reset’. The repetition rate, or the ‘Count’, shows a measure of the amount of PD detected per power cycle.
PRPD Power Cycle Mode
In Cycle Mode, the system shows the PD activity in a phase resolved display (φ.q) which is synchronised with the power cycle. A magnetic field detector synchronises the PD-SG1 with the current in a cable or bus bar placed nearby. The display can be set to show the activity live and constantly updated, or it can be set to infinite persistence (where an image is built up showing the distribution of activity in the power cycle).
PD Location Mode
Precedence Mode is used to locate the originating source of the PD activity. The display shows which sensor is closest to the source by comparing the arrival time of pulses detected on the left and right channels. As the sensors are moved around the equipment under test, the LCD display shows graphically the ratio of pulses detected on each channel. The precedent channel is also indicated with a left and a right LED, as well as acoustically via the stereo headphones.