Continuity Bleeper; Resistance Tests (Kω); Diode Testing - Megger BMM500 Serie Guia Del Usuario

Operation

Continuity Bleeper

The continuity bleeper sounds continuously
when a resistance below the threshold level is
detected. This can be selected from several
values between 2Ω and 3kΩ. To change the
∼
level press the
sound for values above the threshold but below
approx. 3kΩ
1. Set the selector switch to
2. Connect the test leads.
Display (5Ω level selected):
<5Ω
<3kΩ
>3kΩ
To turn off the audible tone and replace it with a
visual indication of continuity, press the TEST
button whilst switched to the
will be displayed momentarily and
appear when resistances below the threshold
are measured.
8
button. Short bleeps will
Audible:
continuous bleep
short bleep
no bleep
range.
Resistance Tests (kΩ)
This is a low voltage (5V) low current (25µA)
test for sensitive electronic equipment. It
operates in 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 resistance range is protected by a high
impedance 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 current. A forward biased semi-conductor
junction will typically measure 15 to 30kΩ and
will
the diode symbol
A reverse junction will measure much higher.
These features together with the small test
is shown on the display.