Dissipation factor tan d standards are designed for checking the accuracy of capacitance and dissipation factor measuring instruments.
A tan d standard is basically a standard capacitor in series with a resistor. To avoid excessive resistance values, a 1000 pF capacitor with a negligible dissipation factor should be used.
The resistance units are included in the scope of supply and have to be calibrated together with the standard capacitor.
Type 3370 NK/30 standard capacitor used for connection of a 3723 resistance unit
The type 3721 resistance unit contains the resistors for all four tan values accommodated in a sheet-metal casing. Four sockets for Lemo 3 cable are provided on one side of the casing and the two plugs on the other. The resistance of the unit plugs directly into the top of the type 3320/1000 standard capacitor.
The type 3723 resistance unit resistors for each tan d values are accommodated in a separate casing. Each casing plugs directly into the top of the type 3370 NK/1000/30 standard capacitor.

Advantages
• No additional cables required and fast to connect
• Exact tan delta values are submitted for the system

Applications
• Checking accuracy of capacitance and tan measuring instruments