Seaward PAC 1500Xi - Manual (Page 4)

The symbol represents double insulation and no earth connection is present in this
type of appliance.
Different regulations and standards describe a variety of tests for electrical appliances
and in general cover approval tests. Such testing involves prolonged sophisticated
tests. It is generally recognised that for periodic inspection to ensure the safety of the
appliance is maintained, tests of the type performed by the PAC1500Xi are realistic and
satisfactory.
TEST SEQUENCE
The PAC1500Xi should be connected to the mains power. There is no power switch
and the unit will be ready for use within a few seconds of applying mains power. A
green READY indicator will illuminate when the PAC1500Xi is prepared for tests, the
display will not show any readings when the READY indicator is illuminated.
It should be noted that there are two ‘safe’ positions on the rotary switch. These are;
a) between the 25A Earth Bond Test position and the Insulation Test position and
b) at the fully counter clockwise position of the selector switch. In either of these
positions the PAC1500Xi is inert and will not conduct any tests irrespective of the
TEST push-button.
Do not touch the appliance while testing is in progress.
VISUAL INSPECTION
Before commencing testing the user should undertake visual checks on the mains lead,
case and fuse of the appliance under test. There should be no evidence of damage of a
nature that may impair the electrical safety of the item.
EARTH BOND TEST
General
The objective of this test is to ensure that the connection between the earth or protec-
tive conductor of the appliance‘s mains supply earth pin and the metal casing of the
appliance is satisfactory and of low enough value to satisfy accepted safety standards.
The development of business machines (such as computers & VDU‘s) has necessitated
the introduction of a low voltage/low current test range in order to allow tests on these
appliances to be conducted without fear of damage being caused by the use of a higher
test current.
Type A tests These are the common form of Earth Continuity tests utilising test
currents of 6A, 12A 20A & 25A at an open circuit voltage of 6V RMS.
It is important that the PAC1500Xi is used to test appliances in the
following sequence. Failure to follow this sequence may lead to
incorrect test results and unsafe equipment being released back into
use. Failure of any test must result in the appliance under test being
rejected and quarantined until any faults are repaired and the
appliance satisfactorily re-tested.
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