Megger LCB2000/2 Bedienungsanleitung Seite 16

Operation - Loop Testing
Phase-Earth loop impedance measurement
(not at a power socket):
If an installation socket is not available, use the 3-wire
lead set.
1. Select Loop L-PE.
2. Connect the red lead to phase and the green lead
to earth. No connection to neutral is required.
3. Supply voltage is displayed.
Note: When black lead is not connected to neutral,
although displayed, the polarity indications are
invalid.
4. Press the TEST key.
5. Measured loop value is displayed.
On completion of this test, the prospective fault current
can be displayed by pressing the ENTER key.
The R1+ R2 value for the circuit may be available
(LCB2500/2 only). See page 18
If desired the test can be repeated by pressing TEST
again.
Bonded Metalwork Testing (1)
This test is performed using the three wire lead set.
1. Connect the green lead to the bonded metalwork.
2. Connect the red lead to phase.
3. Select Loop L-PE.
4. Supply voltage is displayed.
5. Press the TEST key.
6. Measured resistance value is displayed.
Bonded Metalwork Testing (2)
This test can also be performed using the optional earth
bond test lead, allowing connection to an installation
socket.
1. Connect the black flying test lead to the bonded
metalwork.
2. Insert the power plug test lead into a socket
(receptacle).
3. Select Loop L-PE.
4. Supply voltage is displayed.
5. Press the TEST key.
6. Measured resistance value is displayed.
15