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The frequency settings for the meter are mainly depended on the parasitic of the component. In order to achieve more accurate reading of the component, measuring frequencies are directed away from the Self-Resonance Frequency (SRF) of the component. Industry users set the standards at different frequency points depending on the capacitance value (see Table 1). The capacitance over 10uF was considered in the range of Tantalum capacitors. Therefore, as the ceramic capacitance range began to increase into the Tantalum capacitor range, the industry adopted the frequency standard for Tantalum measurements into ceramic capacitors.
The applied voltage is also depended on the capacitance of the capacitor. Generally, the 10uF and under have applied voltage of 1.0 ± 0.2 Vrms. But over 10uF, the applied voltage is 0.5 ± 0.1 Vrms. High capacitance capacitors have very low impedance, therefore to supply enough current to make the measurement, the power supply needs more current than that supplied at 1.0 ± 0.2 Vrms. Therefore, by lowering the applied voltage, the power supply will be able to supply enough current to measure the high capacitance capacitor accurately.
|Class I||1,000pF and under||1MHz ± 10%||0.5 ～ 5 Vrms|
|Over 1,000pF||1kHz ± 10%|
|Class II||10uF and under||1kHz ± 10%||1.0 ± 0.2 Vrms|
|Over 10uF||120Hz ± 20%||0.5 ± 0.2 Vrms|
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