Continuity Bleeper - Megger BM400/2 Série Guide De L'utilisateur

INSULATION TESTS (MΩ)
Insulation tests operate only when the TEST button is pressed. Grey
labelling denotes where it is necessary to press the test button. To prevent
damage to the instrument from accidental connection to a 'live' circuit, the
test button must not be pressed (or locked down) before connecting to
the item under test.
1. Set the selector switch to the test voltage required.
2. Connect the test leads, first to the instrument, and then to the isolated
item under test.
3. Press the TEST button to activate the test voltage.Take the reading.
4. Release the TEST button at the end of the test. The reading will hold
for a few seconds.
5. Capacitive circuits charged during a test will automatically discharge.
The Live Circuit Warning is displayed If significant voltage remains.
6. Remove the test leads only when no voltage is indicated.
Note: There is a safety delay of 3 seconds on the first operation on the
'1000 V' range, each time the range is selected.
Automatic Discharge
When the test button is released after an insulation test, a 250 kΩ resistor
is automatically switched across the terminals to discharge the item under
test. Any voltage present will be indicated on the display so that the
discharge can be monitored (except on the BM402/2 and BM404/2,
which will display a flashing 'V'.)
Polarization Index Testing (PI)
All insulation ranges can be used for PI testing. PI is the resistance value
after 10 minutes divided by the resistance value after 1 minute. More
detailed information on PI Testing and value assessment can be found in
AVO International publications listed in the Accessories.
CONTINUITY TESTING (Ω)
Continuity tests are activated when the probes make contact. The test
operates without the need to press the TEST button.This range is not
suitable for diode testing .
Set the selector switch to Ω.
1.
2. Connect the test leads. The pointer will appear when connection to
<10 MΩ is made.
3. The test will activate automatically.
4. After the test probes are disconnected, the reading will be held for a
few seconds.

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 5 Ω. If contact to less than 5 Ω is maintained for five seconds, the
bleeper stops, and the display shows the measured resistance.
1. Set the selector switch to
2. Connect the test leads.
RESISTANCE TESTS (kΩ)
This is a low voltage (5 V) low current (20 µA) test for sensitive electronic
equipment. It operates in the same way as the Continuity ranges. This
range can be used for diode testing.
1. Set the selector switch to kΩ.
2. Connect the test leads.
3. The test will activate automatically.
)
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