Fluke 867B User Manual page 37

867B/863
Users Manual
Using the Auto Diode Softkeys
4 toggles between AutoDiode and Manual Diode.
When selected, Auto Diode is highlighted and one of
the following icons is displayed:
N
k
g
u
?
5 ( &) is highlighted for Diode Testing.
Pressing this key toggles to Capacitance (|) and
disables Diode Testing.
"Rel" and "/" (Continuity) are not available in Auto
Diode.
2-12
|
Auto
&
Diode
(short)
(open)
( (unknown)
Using the Manual Diode Softkeys
/
Rel
4 selects Manual Diode testing (Auto Diode not
highlighted). Selecting Manual Diode initially sets
"Rel" and "/" (Continuity) off.
In Manual Diode test, voltage is developed across
the components(s) by a test current (approximately 1
mA with the test leads shorted) from the meter.
Voltage is read on a 0 to +3.000V range that can
measure up to five silicon diode or transistor
junctions in series. For a silicon diode, the typical
forward voltage is about 0.6V. Voltages greater than
3.00V or open test leads produce an overload (OL)
reading. If the digital reading is the same in both
directions, the diode junction is probably shorted. If
the display reads OL in both directions, the diode
junction is probably open. To protect sensitive
devices the open test lead voltage will not exceed
3.1V. Negative inputs (from an external power
source) are not suppressed.
|
Auto
&
Diode