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

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

Description:
- 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 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.
- Dual terminal, for fast and easy inspect general capacitor or resistor, a printed ESR table for fast check

Specification:
- 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
- AUTO/  manual mode:
- Auto  Range:
- Press and  release the Range button and at the first line of LCD  will show “AUTO:"
- At auto  mode meter will automatically select the best range to  detect.

Manual  Range:
- Scroll  the manual range from 1R, 10R and 100R range,
- In LCD will show 0-1R, 1-10R and 10-100R.
Key  Zero:
- Short circuit the testing terminal, cancelling the wire resistance.
- Long  press and hold the “ZERO" button for 5s, LCD shows  “ZERO" and wait the zero disappear.

Backlight:
- While  power up LCD shows the “ESRMETER V1.0"for 4 seconds,  within these 4 seconds, user can press the “Range" button to switch backlight on/ off
- Low  Battery Detection:  For battery used up 85%, LCD will  show “LO BATT"flashing in LCD first line, user should  replace a new battery to operate.
- Power: 9V  battery

 *PLEASE DISCHARGE THE CAPACITOR BEFORE TESTING, you can use a screwdriver to short circuit, or series with a resistor around 10 ohm and short for 5 to 10s.
There is 2 fast diode inside the meter to prevent high voltage, but it is important to discharge the capacitor firstly, as it is a large surge current and voltage and may damage the meter.

Package including:
- 1 *  unit MESR-100
- 1 *  pair test probe (as photo shown)