1417 FOUR TERMINAL CAPACITANCE DECADE STANDARD

1417 Four-Terminal Capacitance Standard consists of a 1µF standard capacitor and two precise inductive voltage dividers used to scale the value of the 1µF capacitor up to 1F in decade steps. 
This arrangement provides accuracy and stability unattainable with very high-value true capacitors.

• 1uF to 1F in decade steps

• 0.25% direct-reading capacitance accuracy

• 0.1% or better ratio accuracy

• Dissipation-factor standard

• Laboratory Standard

• Standard for Dissipation Factor

• Verification & Calibration of LCR Meters

• Working Standard

• Verification of Calibration of LCR Meters

• Capacitance Measurement Functions

• Calibrating Instrumentation

In addition to the seven direct-reading capacitance values, an infinite number of intermediate
or higher capacitance values can be obtained by using external capacitors. 
An external capacitor is simply connected to the 1417's external standard terminals, either directly
or in parallel with a 1µF internal standard, and the resulting capacitance is scaled in value by the 1417's inductive voltage dividers.
The direct-reading accuracy of the 1417 is ±0.25% plus ratio accuracy at test frequencies of 100, 120, or 1000Hz. Since the 1417 scaling ratios are precise and repeatable, better accuracy can be obtained by measuring the actual value of the internal 1µF standard or of an external standard before scaling.
The 1417 also serves as a standard of dissipation factor (D). 
The dissipation factor of the 1417 is intentionally set to 0.01 at test frequencies of 100, 120 and 1000Hz. 
Basic D accuracy at these frequencies is ±0.001.
The 1417 may also be used as a two-terminal capacitance standard when higher D values
can be tolerated. In a two-terminal configuration, D is less than 1 for capacitance values up
to 1000µF at frequencies below 150Hz. 
This feature allows the 1417 to be used in calibrating the higher capacitance ranges of popular universal or RLC bridges.
One additional feature of importance is that all the 1417's parameters are measurable (without
disassembly) so, in effect, its ultimate accuracy depends on the accuracy of the external
measurement equipment.