Meginreglan um að mæla rýmd með multimeter
Í ódýra fjölmælinum er rafrýmdsmælingin fengin með því að breyta hleðslutíma mældu rafrýmdarinnar í púls í gegnum tímagrunnrásina, samþætta púlsinn og mæla síðan samþætta gildið.
Slightly better may use quadrature detection, that is, the so-called digital bridge, after measuring the phase difference, use the single-chip microcomputer to calculate the result of the reactance. In addition, the frequency method can also be used to measure the capacitance through the frequency change of the oscillation circuit. C diff -> Freq Diff frequency change can be measured with a counter, or read out with a voltmeter for F ->V umbreytingu.
