Battery Check - AVO MEGGER BM400/2 Guide De L'utilisateur

Zeroing of Test Lead Resistance
The resistance of the test leads can be nulled on the Continuity ranges
(up to 9,99 Ω).
1. Select either Continuity range.
2. Short the test leads across a known good conductor.
3. When the reading has stabilized, press the TEST button. A short
bleep will sound and
4. To cancel the zero offset press the test button again or switch OFF.
VOLTAGE TESTS (V) (Except BM402/2 & BM404/2)
The measured a.c. or d.c. voltage is indicated on the display. Pressing the
T E S T button will toggle the analogue scale display between the default of 0
to 500 V (1 V resolution) and 1 to 50 V (0,1 V resolution). When a.c. volts
are detected the ' ~' symbol will appear next to the 'V'. The presence of
negative d.c. is indicated by ' - d c' on the display, but no reading is given.
If the voltmeter operation is in question, test on a known source.
1. Set the selector switch to V.
2. Connect the test leads.
3. After a short settle time,the reading will be displayed automatically.
Live Circuit Warning
When more than 25 V is applied to the terminals, the instrument defaults
to a voltmeter on all switch positions except OFF and Battery Check. In
addition, the bleeper will sound on all switch positions except OFF and V.
All selected tests will be inhibited except for Insulation tests, which will
remain available until the voltage exceeds 55 V.
Note: The BM402/2 & BM404/2 which do not have a voltage range,
will bleep and display a flashing 'V'. Testing is inhibited.

BATTERY CHECK (

To measure and display the battery voltage under simulated load
conditions, select battery check.The analogue arc represents the
remaining battery life. If an external voltage >±1 V is detected, the display
will flash and the bleeper will sound.
Battery Replacement
When the low battery symbol
and should be replaced as soon as possible. To install or replace the
cells, disconnect the test leads, switch the instrument to OFF and loosen
the captive screws holding the battery compartment cover in place.
Remove the cover and lift out the cells. Ensure that the replacement cells
are fitted with the correct polarity in accordance with the label in the
battery compartment. Replace and re-secure the battery compartment
cover. Remove the cells if the instrument is not going to be used for an
extended period of time.
Fuse Checking and Replacement
To check the instrument fuse switch to an insulation range and press the
TEST button. The symbol
Note: The voltmeter will continue to operate for voltages greater than
100 V at 50 Hz.
To replace the fuse, disconnect the test leads, switch the instrument OFF
and loosen the captive screws holding the battery compartment cover in
place. Remove the cover and replace the fuse of the correct type and
rating. Replace and re-secure the battery compartment cover.
will appear.
)
appears, the cells are nearly exhausted
will appear if the fuse is ruptured.