Fluke 27 Инструкция по эксплуатации онлайн [18/30] 4572

Users Manual

charges the capacitor and the needle slowly moves back

to the open (infinite ohms) position. The higher resistance

ranges offer increased sensitivity for checking smaller

capacitors.

The analog bar graph can make similar checks in the

resistance function, even in the autoranging mode. As a

capacitor is placed across the inputs, the analog bar

graph quickly shortens, then rapidly down-ranges,

depending on the size of the capacitor. As the capacitor

charges, the bar graph slowly extends back to its full 31-

segment length, up-ranging if necessary. For capacitors

as small as 0.1µF, only the 32-megohm range is involved.

In a fixed range (using manual range mode), the time it

takes for the bar graph to extend from zero to full scale

indicates the approximate capacitance value. Table 3

gives typical capacitance values for various charge times

on different resistance ranges. For very small capacitors,

use the conductance (nS) mode.