• Make a second test by reversing the leads of the ohmmeter. • If your meter indicates the capacitor is either shorted or open, retest the capacitor on a higher ohm’s scale to confirm your findings.

For example, those 100 nF capacitors really ought to be placed within 10 mm of your chip if it’s operating at 100 MHz, but you can get away with even 10 cm if no signals go much above 1 MHz.

Capacitor leakage is measured by applying a fixed voltage to the capacitor under test and measuring the resulting current. The leakage current will decay exponentially with time, so it’s usually ...

and ESL1=L2 - L1 Similarly, and ESR1=R2 - R1 Thus, the ESL and ESR values of the capacitor under test can be determined simply by measuring the waveforms (Fig. 3) and using the above formulas.

The testers identify bad or failing capacitors that may rupture upon energizing. Cap Check I and II are designed for pole mounted and individual capacitors and can enable a two-man crew to check a ...

The 881, including a user manual, 9-V dc battery, and tweezer test probe, costs $199. B&K Precision Corp. www.bkprecision.com; (714) 921-9095 About the Author ...

Testing capacitors can measure the stored charge. To perform a capacitance test, look for a symbol that features a vertical line to the left of what looks like a right-facing parenthesis, with a ...

The Quick-Check Transformer & Capacitor Tester from HD Electric is a versatile tool for quick and easy checks of capacitors, transformers and the connections made to them. In the field, the ...