This product is a stand-alone instrument, configured and operated through on-screen menus and corresponding push buttons. Although it does not need to be connected to a PC to operate, it can be connected to a PC to download data and capture screenshots. It has several display modes, including a simple charge meter, a monochrome phase-resolved PD pattern display, and a DSO display. With the DSO option, the unit can be used to perform location of PD sites in shielded power cable using time domain reflectometry (TDR) methods.
The instrument provides effective noise gating that blocks phase-stable noise as well as noise independent of the applied voltage cycle, allowing it to be used in noisy environments without losing significant PD data. It is also available in a fully portable battery-powered version that is synchronized to the grid through a radio transmitter. The battery powered version permits 3-4 hours of independent operation. The removable NiMH battery is charged automatically when the instrument is connected to the mains supply.
Power Diagnostix Systems GmbH, Bruesseler Ring 95a, 52074 Aachen. Tel: +49-241-74927; Fax: +49-241-79521.