Keysight U1271A Guia Del Usuario página 72

2 Making Measurements
The resistance function can produce enough voltage to forward-bias silicon diode
or transistor junctions, causing them to conduct. If this is suspected, press
to apply a lower current in the next higher range.
Figure 2-14
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Keysight
Smart
Measuring resistance
Keysight U1271A/U1272A User's Guide