Seaward A252 - Manual (Page 13)

A252 Portable Appliance Tester INSTRUMENT DESCRIPTION
Set Inf. These two controls, adjacent to the test selector, are multi-turn adjusters for setting-up the
associated metering circuits. Select Earth Test or Functional Earth, plug the clip lead into the appropriate
socket, this also selects the associated metering range, and isolate the clip. Depress the main Test button
and adjust the Set Inf. control until the meter pointer is on the Inf. mark of the appropriate scale.
Earth Return Sockets These sockets are used, with the earth return clip lead (see below), to select the
test current to be applied Use the yellow socket for the 8A test required for electronic audio/visual (BS415)
apparatus or the green socket for the 25A test required for power tools and electrical appliances. The blue
100mA socket is used when applying the low current Functional Earth test on sensitive IT equipment.
Earth Return Clip Lead this lead is used to complete the Earth circuit test path, it is plugged into the
appropriate green, yellow or blue Earth Return socket and then clipped to clean, exposed, metalwork on the
appliance. Ensure that the clip is soundly connected to prevent any high current arcing causing damage to
polished surfaces. This lead is not required when testing double insulated appliances.
DEPRESS TO TEST this momentary action push button is used to apply the selected safety test.
10mA TRIP this push button is used to select the higher trip threshold for Class I Flash Tests.
D0010024.DOC (01/01/94) Page 13 INSTRUCTION MANUAL