– 7 –
3. When using the 4000 M
Ω
range a fixed 20 count must be subtracted in
order to obtain a true measurement. For example when measuring a
resistance of 1200M
Ω
, the display will read 1220M
Ω
.
6 CONTINUITY TEST
!
WARNING: Remove all power from circuit being tested when check-
ing continuity. Discharge any charged capacitors. Never connect
the probes to any voltage while the range switch is set to 400
.
6-1
Plug the red test lead into the V
Ω
jack and the black test lead into the
COM jack.
6-2
Set the range switch to the
400
setting.
6-3
Attach the test leads to the circuit.
6-4
The buzzer will sound when the circuit has less than 50
Ω
resistance and
the measured resistance value will be displayed.
7 DIODE TEST
!
WARNING: Remove all power from circuit being tested when using
the diode check. Discharge any charged capacitors. Never connect
the probes to any voltage while the range switch is set to
.
7-1
Plug the red test lead into the V
Ω
jack and the black test lead into the
COM jack.
7-2
Set the range switch to the
setting.
7-3
Connect the probes to the device you want to test. Note the meter
reading.
7-4
Reverse the probes and note this reading.
7-5
If both values are between 2.8V and 3.2V the device is open. If both
values are very small the device is shorted. If one reading is between 2.8V
and 3.2V and the other is between 0.5 and 0.7V then the device is good.
8 TRANSISTOR HFE MEASUREMENT
!
WARNING: Remove all power from circuit being tested when using
the HFE ranges. Discharge any charged capacitors. Never connect
the probes to any voltage while the range switch is set to HFE.
8-1
Set the range switch to either the NPN or PNP position.
8-2
Insert the leads of the transistor into the correct positions of the transistor
socket.
8-3
Read the displayed transistor HFE.
NOTE: The HFE reading is limited to the test current of the multimeter circuit
(10
µ
A/3.0V). This may be different than the published transistor data but
will provide information as to whether the transistor is functional.
