The 16380A is a capacitor set consisting of four precision capacitors - 1pF (16381A), 10pF (16382A) 100pF (16383A), 1000pF (16384A). These capacitors are primarily used for performance tests of Keysight's 4-terminal pair LCR meters and impedance analyzers.
The 16380A was designed for use in calibrating precision impedance measuring instruments such as (LCR meters, impedance analyzers, etc.) That have capacitance ranges between 1 pF and 1000 pF. The Keysight 16380A can be used to directly certify capacitance measurement accuracy over the 1 pF to 1000 pF range.
The 16380A can be connected directly to the measurement terminals of impedance measuring instruments that have the 4-terminal pair configuration. Other terminal configurations, such as 3-terminal and 5-terminal, can also be accommodated by using test leads and the furnished BNC adapters.