Description :<br>MESR-100 AutoRanging ESR Low Ohm Circuit Capacitor Meter Tester<br>Feature :<br>Measuring range from 0.001 to 100.0R， support IN CIRCUIT Testing.Using true 100 KHz sine wave to measure the ESR value， which is equal to the testing method of capacitor manufacturer.<br>What is ESR of capacitor?<br>There is a series resistor inside capacitor， using 100kHz to remove the impedance1\/(2*pi*F*C)， the impedance become small， and we can then measure the true seriesresistor value.A bad E-capacitor will have larger ESR and create large ripple rather than filteringnoise. Normally， a big capacitor is larger than 3 ohm.<br>Using this theory， we can measure the capacitor is bad\/ damaged or good in condition.Because our ESR meter only applies less than 15mV DC or peak to peak on a goodcapacitor， as a result we can use it as in circuit test. Because this low testing voltage， itcannot turn on the semiconductor inside a circuit under testing.During repairing TV， LCD， Audio board， etc. we can in circuit testing the capacitor isgood or not.<br>       1.Accuracy : Up to 1% (detail on above table)  2. High Resolution : 4 digit， or 0.001Ohm @ 1 Ohm range  3. Measuring voltage : &amp;lt;~40mV RMS (TESTING VOLTAGE)  4. Clamping voltage : ~0.15V (open voltage)  5. Battery 2X AA 1.5V battery  6.External Power : 5V micro USB  7.Operating current : 0.02A  8.Battery Life time : &amp;gt;80 Hours<br>Package included :<br>1 x MESR-100 Circuit Capacitor Meter2  x Test Clips1 x English Manual<br>Details pictures :