A simple capacitance and leakage current meter for electrolytic capacitors. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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A simple capacitance and leakage current meter for electrolytic capacitors. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Measuring technology

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This device measures the current through a capacitor when an alternating voltage of 1,5V 50 Hz is applied to it. Such a low voltage value does not penetrate the oxide layer, so the reverse current does not affect the measurement accuracy.

The scale of the current meter is calibrated in terms of capacitance, using reference capacitors.

Also, the device allows you to measure the leakage current of capacitors at its operating voltage.

(click to enlarge)

To measure the capacitance value, it is necessary, with the capacitor connected, with resistor R1 to set the readings of the device 2 to the middle of the scale (1,5V), and by pressing the button, select the limit of the meter scale with switch S3. With the same switch, we select the current scale when measuring leakage. Capacitance measurement mode and voltage scale when measuring current are selected by switch S2. The voltage, when measuring the leakage current, is also set using R1. Newer capacitance meter here.

Publication: shustikov.by.ru

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