mælingarnákvæmni snjallra multimeters
Nákvæmni vísar til hámarks leyfilegrar villu í tilteknu notkunarumhverfi. Með öðrum orðum, nákvæmni er notuð til að gefa til kynna
How close the DMM's measurement is to the actual value of the signal being measured.
Fyrir DMM er nákvæmni venjulega gefin upp sem hlutfall af lestri. Til dæmis er merking 1 prósents lestrarnákvæmni: þegar skjár stafræna margmælisins er 100.0V, getur raunveruleg spenna verið á milli 99,0V og 101,0V .
Specific values may be added to the basic accuracy in the detailed description. Its meaning is the number of words to be added to transform the rightmost end of the display. In the previous example, the accuracy might be marked as ±(1 percent plus 2). Therefore, if the GMM reads 100.0V, the actual voltage will be between 98.8V and 101.2V.
The accuracy of an analog meter is calculated in terms of full{{0}}scale error, not the displayed reading. The typical accuracy of an analog meter is ±2 percent or ±3 percent of full scale. The typical basic accuracy of a DMM is between ±(0.7 percent plus 1) and ±(0.1 percent plus 1) of reading, or even higher.
