Megger CM500 - Connecting to the Supply

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Connecting to the Supply
Power plug method
The simplest way of connecting to the installation is by inserting
the power plug into a convenient installation socket. If Setting A
is selected when using the plug terminated lead set, the polarity
of the mains socket is immaterial. Line and Neutral will be
swapped if necessary, and an indication given on the display.
Setting b requires Line and Neutral to be fixed.
1. Insert the power plug into an installation socket.
2. Select and set the rated current, RCD type and the test
type.
3. Supply voltage, configuration symbols and polarity are
displayed.
4. Press the
TEST key.
5. See previous notes for
Type of test .
If desired the test can be repeated by pressing
TEST again.
2-wire lead set method
If an installation socket is not available use the 2-wire lead set.
1. Connect the red lead to phase and the black lead to earth.
No connection to neutral is made.
2. Select and set the
rated current, RCD type and the test
type.
3. Supply voltage and polarity are displayed prior to the test.
Note: Though displayed, polarity indication with the 2-wire lead
set is invalid and should be ignored.
4. Press the
TEST key.
5. See previous notes for
Type of test.
If desired the test can be repeated by pressing
TEST key again.
Automatic testing
To aid rapid testing, the CM500 can be set to start a test
automatically when connected to the supply. This may be of
use, for example, when using a clip and a probe. Select the
range required and press the test key without the supply
present. The instrument will display
<100 V for approximately
30 seconds. Apply the supply voltage within this time and the
instrument will pause before performing one test
automatically.