Capacitor Reads Ol. Web before touching it or taking a measurement, a) turn all power off, b) use your multimeter to confirm that power is off and c) carefully discharge the capacitor by connecting a resistor across the leads (as noted in the next paragraph). But not 0ω or several mω.
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Set the multimeter to a higher range if possible. You also need to measure the esr, especially for electrolytic capacitors. This result can also mean the capacitor has shorted. A normal capacitor would have a resistance reading up somewhere in between these 2 extremes, say, anywhere in the tens of thousands or hundreds of thousands of ohms. Web i'm using a morris #57044 multimeter, which has an autoranging capacitance measurement setting. But generally, ol stands for “open loop,” which is another way of saying there is an inadequate amount of continuity. This is a simple but effective method for finding out if a capacitor is defective or not. It is designed to test capacitors on the board/incircuit and works for many of those i've tested. Web an “ol” or “overload” reading means the capacitance is too high for the multimeter to measure. You could have an electrolytic capacitor that measures exactly what its rated capacitance suggests, but the cap will not work at all in the circuit because its esr is too high.
This is a simple but effective method for finding out if a capacitor is defective or not. Will a bad capacitor keep a motor from running? However, i have board with two 0.47uf, 50v electrolytic capacitors and get an overflow message when testing. Web before touching it or taking a measurement, a) turn all power off, b) use your multimeter to confirm that power is off and c) carefully discharge the capacitor by connecting a resistor across the leads (as noted in the next paragraph). Set the multimeter to a higher range if possible. It is designed to test capacitors on the board/incircuit and works for many of those i've tested. Web “ol” could be of a different meaning. This is a simple but effective method for finding out if a capacitor is defective or not. If the multimeter can’t measure the amount of charge in a capacitor, it might display an “ol” or “overload” reading. You also need to measure the esr, especially for electrolytic capacitors. If possible, use a higher range on your multimeter.
