Megger BMM500 Series, Руководство пользователя

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Continuity Bleeper
The continuity bleeper sounds continuously
when a resistance below the threshold level is
detected. This can be selected from several
values between 2
Ω
and 3k
Ω
. To change the
level press the button. Short bleeps will
sound for values above the threshold but below
approx. 3k
Ω
1. Set the selector switch to
2. Connect the test leads.
Display (5
Ω
level selected): Audible:
<5
Ω
continuous bleep
<3k
Ω
short bleep
>3k
Ω
no bleep
To turn off the audible tone and replace it with a
visual indication of continuity, press the TEST
button whilst switched to the range.
will be displayed momentarily and will
appear when resistances below the threshold
are measured.
Resistance Tests (k
Ω
)
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 k
Ω
.
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 30k
Ω
and
the diode symbol is shown on the display.
A reverse junction will measure much higher.
These features together with the small test
Operation
8
∼