Seaward Apollo 600 - Manual (Page 17)

Nulling a single test lead
In the manual PAT screen, press the setup key (F3) and change the Test Type to EUT
Continuity Test. Press save (F4). Connect the earth continuity test lead to the earth continuity
test socket and connect the probe tip to the earth pin of the EUT socket. Press Null (F4) to
measure and stored the test lead resistance. When the null feature is active the Null icon will
appear on the display.
Nulling both test leads
In the manual PAT screen, press the setup key (F3) and change the Test Type to Point to
Point Continuity Test. Press save (F4). Connect both earth continuity test leads to the earth
continuity test sockets and connect the probe tips together using the supplied alligator clips.
Press Null (F4) to measure and stored the test lead resistance. When the null feature is active
the Null icon will appear on the display.
Insulation Resistance
Always ensure that the circuit under test is electrically isolated.
Connecting a test probe to a hazardous voltage when a point to point
measurement is active will result in that voltage being present on the other test
probe.
This test is applicable to Class I and Class II equipment. This test will measure one of the
following:
•
insulation resistance between live circuits and the protective earth circuit in the EUT –
Class I / IEC lead insulation test
•
insulation resistance between live circuits and a test probe applied to the EUT –
Class II insulation test
•
insulation resistance between two test probes – Point to Point Insulation
to ensure that the test points are adequately insulated from one another. The measurement is
displayed in MOhms.
There are three possible connection methods for the Insulation test.
CLI and IEC Insulation
The test is performed between the EUT test socket live and
neutral and the EUT test socket earth pin.
For IEC leads the other end of the lead should be
connected into the IEC test socket.
CLII Insulation
The test is performed between the EUT test socket live and
neutral and Red test terminal.