Operation - Megger LCB2000/2 Guide De L'utilisateur

Operation - General
Backlight
The display backlight gives a clear display of
measurements in poor lighting conditions. The backlight
will briefly operate when the instrument is switched on.
To switch the backlight on, press the backlight key (see
key on page 5). Press the key again to switch the
backlight off.
To conserve battery power, the backlight will
automatically switch off after about 15 seconds (if the
battery voltage is low, this period is automatically
reduced).
Auto Shut-off
To extend battery life, after a period of instrument
inactivity the instrument will switch itself off, preceded
by a series of bleeps. To switch the instrument back on,
press any key other than the TEST key.
Switched Probe SP2
This accessory can be used anywhere that the 2-wire
lead set is specified in this User Guide. The press switch
on the probe duplicates the function of the TEST key on
the instrument, allowing quick and easy testing.
Checking Earth Potential
To quickly distinguish live and earth, this feature
provides display indication if a voltage greater than 100V
exists between the earth connection and your finger.
1. In any switch position except OFF and RCL
(LCB2500/2 only), connect the earth connection
10
(black for the 2-wire lead set, green for the 3-wire
lead set) to earth.
2. Touch a finger to the metal pad on the top. This is
safe and will not endanger you.
3. If a voltage greater than 100V exists between the
finger (normally at earth potential) and the earth
wire, the warning symbol is displayed.
Voltage and Frequency Measurement
This instrument will display the supply voltage and
frequency in all switch positions except RCL and OFF.
The ENTER key will alternate between voltage and
frequency.
Power plug connection
1. Insert the power cord plug into an installation socket.
2. Supply voltage and polarity are displayed.
3. Press ENTER to alternate between supply voltage
and frequency.
3-Wire Lead Set Connection
If an installation socket is not available and it is
necessary to connect to all three conductors, use the
3-wire lead set.
1. On a single phase system connect the red lead to
phase, the black to neutral and the green to earth.
2. Supply voltage and polarity are displayed.
3. Press ENTER to alternate between supply voltage
and frequency.
Note: For connection to a three phase system, see
'Determining Phase Sequence'.