Seaward PAT2000i - Manual (Page 12)

Use of the PAT2000i is straight forward. Plug the tester into a suitable outlet and follow
the instructions on the LCD display.
Variations of the standard instrument are available to suit international voltages and
connecting sockets, details of those available at this time are listed under the section
Specifications.
APPLICATIONS
The PAT2000i is designed to check the electrical safety of portable appliances and its
comprehensive testing routine allows for appliances of safety Class I and Class ll
insulation to be checked.
As a guide BS and IEC standards define these two categories of insulation as follows:
Class l: Appliances which have a basic functional insulation throughout and which
include a means for the connection of exposed conductive parts to earth via the fixed
wiring installation. These are often described as earthed appliances.
Class ll: Appliances which have both basic functional and additional supplementary
insulation . These appliances have no provision to connect exposed conductive
surfaces to a protective conductor.
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 type approval tests. Such testing involves prolonged sophisticated
techniques. It is generally recognised that for periodic inspection to ensure that the
safety of the appliance is maintained tests of the type performed by the PAT2000i are
realistic and satisfactory.
The same sequence of tests can be carried out for either 230V or 110V appliances.
400V appliances are restricted to non loading tests only, as described in the
instructions for the Seaward 3 phase adaptor.
Nine different tests are performed by the PAT2000i and these are described as follows:
VISUAL INSPECTION
The objective of the visual checks is to confirm that the appliance under test is not
damaged and thereby safe to test. The user is asked to check the lead, case and
fuse. If any of the three checks is answered “no” then a fail is recorded in the test
results.
EARTH BOND TEST
The objective of this test is to ensure that the connection between the earth or
protective conductor of the appliances mains plug earth pin and the metal casing of the
appliance is satisfactory and of low enough value to satisfy accepted safety standards.
The PAT2000i applies a low voltage of approximately 6 volts ac rms between the earth
pin of the mains supply plug and the lead connected to the earth bond test terminal, a
high current is allowed to flow for a period of 5 seconds which can be either
approximately 6 amps, 12 amps or 25 amps depending on which range is selected. The
objective of the high current is to test under load conditions and the duration of the test
is limited to 5 seconds to prevent damage or over stressing which may be caused by
testing for prolonged periods.
PAT 2000i Portable Appliance Tester
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PAT 2000i Booklet 7/3/03 4:26 pm Page 10