Continuity Bleeper - Megger BMM2500 Guide De L'utilisateur

Possible sources of error
Measurements and results can be effected by the
following:
• The impedance of operating circuits connect-
ed in parallel
• Impedance such as inductors that vary during
the measurement
• A poor connection to the circuit under test.

Continuity Bleeper

The continuity bleeper sounds continuously when
less than 5 Ω is detected. Short bleeps will sound
for resistances lower than a few kΩ and above 5Ω.
1. Set the selector switch to
2. Connect the test leads.
Display:
<5Ω
<3kΩ
>3kΩ
Resistance Tests (kΩ)
This is a low voltage (5 V) low current (25 µA) test
for sensitive electronic equipment. It operates in
10
Audible:
continuous bleep
short bleep
no bleep
the same way as the continuity ranges.
1. Set the selector switch to kΩ.
2. Connect the test leads.
3. The test will activate automatically.
The kΩ range features a range lock facility. To
LOCK the kΩ range press the
symbol will appear. To scroll through the available
ranges press the
f e a t u re hold the
The resistance range is protected by a high imped-
ance method and therefore if the instrument is
connected to a live circuit the fuse will not blow as
on the insulation, continuity and buzzer ranges.
The instrument will merely indicate the applied
over-voltage.
Diode Testing
This range can also be used for diode testing, the
positive terminal being the source of the test cur-
rent. A forward biased semi-conductor junction will
typically measure 15 to 30kΩ, and a reverse junc-
tion much higher. These features together with the
small test current and wide measurement range
key, the LOCK
key. To de-select the L O C K
key down.