Functional Description 15
when the reading is below 9% of full scale (2700 counts). The auto
range function will range from the highest range, 30Mohms, to the
lowest range, 300mohms.
The XT560 measures from 10μohms to 30Mohms in 9 ranges. The
ranges are: 300mohms, 3ohms, 30ohms, 300ohms, 3kohms, 30kohms,
300kohms, 3Mohms, and 30Mohms .
HOLD Mode
When the XT560 is operating in the display hold mode, pressing the
HOLD key allows the user to take a measurement and hold that
measurement value on the display. Press the HOLD key again to
remove the hold function.
Four-Wire Measurement
The XT560 makes 4-wire resistance measurements as shown in Figure
8. The source HI and LO leads apply a known, internal current source
to the unknown resistance, the sense HI and LO leads measure the
voltage across the unknown resistance.
Figure 8. Four-wire Measurement Diagram
