9
3.9. Diode Test
1. lnsert the black test lead banana plug into the negative
COM
jack
and the red test lead banana plug into the
V
positive jack
2. Turn the function switch to
position.
3. Use the
MODE
button to select the diode function if necessary
(diode symbol will appear on the LCD when in Diode test mode)
4. Touch the test probe tips to the diode or semiconductor junction
under test. Note the meter reading
5. Reverse the test lead polarity by reversing the red and black leads.
Note this reading
5. The diode or junction can be evaluated as follows:
• If one reading displays a value (typically 0.400V to 0.900V) and
the other reading displays
OL
, the diode is good.
• If both readings display
OL
the device is open.
• If both readings are very small or '
0
', the device is shorted.
3.10. Non-Contact AC Voltage Measurements
WARNING:
Risk of Electrocution. Before use, always test the Voltage
Detector on a known live circuit to verify proper operation
1. Touch the probe tip to the live conductor or insert into the live side of
the electrical outlet.
2. lf AC voltage is present, the detector light will illuminate.
NOTE:
The conductors in electrical cord sets are often twisted. For best
results, rub the probe tip along a length of the cord to assure placing the
tip in close proximity to the live conductor.
NOTE:
The detector is designed with high sensitivity. Static electricity or
other sources of energy may randomly trip the sensor. This is normal
operation.
4. Button
4.1. MODE/VFD (Variable Frequency Drive) Button
• Press MODE/VFD key to select the double measurement functions.
This key is active in VAC/Hz/%VFD,
Ω
/CAP, position to select
among resistance test. diode test. continuity test. HZ%, and in
Temp position to select between ˚C or ˚F.
• Press and hold the
MODE/VFD
key and turn the selection switch to
turn the system on, the auto power off function will be cancelled.
• Press and hold the
MODE/VFD
key for 2 seconds to switch to VFD.
