sunkee MESR-100 AutoRanging In Circuit ESR Capacitor /Low Ohm Meter Up to 0.01 to 100R Shopping

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Product Name : sunkee MESR-100 AutoRanging In Circuit ESR Capacitor /Low Ohm Meter Up to 0.01 to 100R

Features:
JINGYAN MESR-100 Autoranging capacitor ESR and Low Ohm Meter
Measuring range from 0.01 to 100.0R, support IN CIRCUIT Testing.
Using true 100KHz square wave to measure the ESR value, which is equal to the testing method of capacitor manufacturer.
In the market, there is some technique using short pulse method to testing, but the value will be varying vs the capacitance and sometimes reading is different from the manufacturer's value.
What is ESR of capacitor?
There is a series resistor inside capacitor, using 100kHz to remove the impedence 1/(2*pi*F*C), the impedence become small, and we can then measure the true series resistor value.
A bad E-capacitor will have larger ESR and create large ripple rather than filering noise. Normally it is smaller then 1 ohm.

Using this theory, we can measure the capacitor is bad/ damaged or good in condition.
Because our ESR meter only apply less than 15mV DC or pk to pk on a good capacitor, so we can use it as in circuit test. Because this low voltage, it can not turn on the semiconductor inside a circuit under testing.
During repairing TV, LCD, Audio board, etc. we can in circuit testing the capacitor is good or not.

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*Dual terminal, for fast and easy inspect general capacitor or resistor, a printed ESR table for fast check
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Range
Accuracy (After Zero, tested with 1,10,100R resistor)
Refresh Time (Manual Mode)
*Auto mode take 0 to 2s more time depend on value
0.00 to 1.00R
1%+1Digit
~0.3s
1.00 to 10.00R
1%+1Digit
~0.3s
10.0 to 100.0R
2%+1Digit
~0.3s

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Product Description : sunkee MESR-100 AutoRanging In Circuit ESR Capacitor /Low Ohm Meter Up to 0.01 to 100R

Accuracy: Up to 1% (detail on below table)

Wide Measurement Range: >1uF (for 0.1uF the error will be larger on equation 1/(2*pi*F*C) @ 100Khz )

High Resolution: 0.01Ohm

1 unit MESR-100

1 pair test probe (as photo)

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