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Making Measurements
Using Auto-diode for Diode Tests (U1272A only)
The auto-diode function will help you test both forward bias and reverse bias
directions simultaneously. You do not need to change the measuring direction to
identify the diode's status.
Table 2-2
Auto-diode voltage thresholds
Forward vol tage
Primary d isplay
OL or <0.3 V or >0.8 V
Within 0.3 V to 0.8 V
OL
The open condition will not be alerted as OL on both directions if the auto-diode
NOTE
function is used.
1 Rotate the multimeter's rotary switch to
2 Press
84
Reverse vol tage
Secondary d isplay
–OL or >–0.3 V or <–0.8 V
–OL
Within –0.3 V to –0.8 V
shown in
Figure
2-21.
to activate the auto-diode function (Auto
The primary display shows the forward bias voltage value. The reverse bias
voltage value is shown in the secondary display.
–
is shown briefly (along with a single beep) on the secondary display if
the diode is in a good condition.
–
is shown briefly (along with two beeps) if the diode is out of the
thresholds.
Diode status
Good
✔
✔
and set up your multimeter as
Auto
).
Keysight U1271A/U1272A User's Guide
No Good
✘
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