Megger BMM2500 Guide De L'utilisateur page 7

Refer to Safety Warnings before using
the instrument
Testing is automatically inhibited if:
• An external voltage >25V is present when
switched to any insulation range position.
• An external voltage >10V is present on all
other ranges (excluding OFF/V/mV).
The external voltage is indicated on the display,
on insulation ranges an audible bleeper will
sound if a test is attempted.
Live Circuit Warning
When more than 25V is applied to the terminals
in the insulation ranges, the instrument defaults
to a voltmeter and gives an audible warning if a
test is attempted. On all other switch positions
except O F F / V / m V when more than 10V is
applied the default voltmeter will be activated.
Testing will be inhibited.
Voltage Testing on High Energy Systems
Use extreme care when using or measuring volt-
6
OPERATION
ages above 30V, particularly in high energy sys-
tems. Fused test leads are available as optional
accessories for local situations where increased
protection is required.
Auto-shut Off
To conserve battery life, Auto-shut Off (pre c e d e d
by a series of bleeps) operates after appro x .
1 0 minutes of instrument inactivity on insulation,
5 minutes on all other ranges. If the instrument is
switched on while holding the
s h u t - O ff time is extended to 60 minutes. To
re s t o re operation after Auto-shut Off, select O F F
followed by the re q u i red switch position.
Note: It is recommended that the instrument is
switched to the OFF position when not in use.
Backlight
The backlight is activated by pressing the
for approx. one minute before automatically
switching off to conserve battery life, alternative-
ly the
key. The backlight will remain illuminated
key can be re-pressed.
∼
k e y, the Auto