Seaward PAT2000i - Manual (Page 6)

LAYOUT
The PAT2000i is contained in a robust polyethylene moulded case with an integral
carrying handle and separate keypad. Power supplies, 230V/110V sockets and high
voltage/power components are housed in the main enclosure. Two indicators show
which of the test sockets is in use. The microprocessor, keypad input, display and i/o
port are housed in the smaller keypad enclosure. The keypad has a “qwerty” layout with
the numbers grouped on the right hand side.
The keypad is held in place by two over-centre latches.
The mains input connector and test leads are housed behind two side panels held in
place by quick release fasteners. Hand tools are not requipped to operate or access the
PAT2000i.
The main unit is connected to the keypad by a 25 way screened interconnection lead as
show in fig 1.
The PAT2000i performs nine functions which include:
• Visual inspection
• Earth bond
• Earth screen
• Insulation
• Flash test
• Load test
• Operation test
• Earth leakage test
• IEC Lead / Extension Lead continuity/polarity test
The control and use of the instrument is extremely simple with clear explicit prompts on
the large liquid crystal display.
SAFETY FEATURES
A number of safety features are included in the instrument design and these include:
• Fuse protection.
• A monitor between neutral and earth connection to the PAT2000i which inhibits
testing if a potential of greater than a nominal 50V exists (as with a reversed
polarity connection). The inhibit can be overridden if the user decides it is safe to
continue e.g. When using an isolating transformer.
• The unit has a default Pass/Fail level for each test. In addition a preset trip level has
also been incorporated for each test which will terminate the test if the measured level
exceeds this value. The exact trip level will vary according to test but will normally be
approximately 120% of the maximum Pass/Fail level.
• An electronic cutout which provides rapid disconnection of internal relays where test
results are detected which are in excess of 5 times the fail limit.
• Sensing circuitry to detect overvolts on the 110V output.
PAT 2000i Portable Appliance Tester
3
PAT 2000i Booklet 7/3/03 4:26 pm Page 4