Seaward B255 - Manual (Page 27)

Operating Manual Clare B255 Power Tool & Appliance Test Station
23
Double Insulated (Class II) Equipment
This test requires the use of the safety Flash Test probe. This has a retractable
tip which is exposed by depressing the red button on the handle.
The supply switch of the tool or appliance must be in the ON position to
ensure that all ‘live’ parts are included when applying a Flash test. For
contactor or electronic start products refer to the Earth Leakage section.
Ensure that the appliance is secured and positioned so as to allow access to
the various test points.
Flash Test – Line+Neutral to Probe
Set the Test Selector to –
3000V LN - Probe for routine re-testing
3750V LN - Probe for repaired or reconditioned equipment
Depress and hold the PRESS TO TEST button and apply the Flash Probe tip
to all exposed metal surfaces, screw heads, casing joints and around
switches and cable entries. In short, anywhere on the outer surface of the
product that may become ‘live’ if an internal fault was present, i.e. loose
strands of wire touching exposed metal or poking through body mouldings
etc.
At each test point observe the TEST RESULT lamps, the green FLASH PASS
lamp should be on, and remain on, to indicate that no flash-over has occurred
at that point to which the probe tip is applied.
If the Flash FAIL lamp and audible alarm come on, the insulation – between
the Line or Neutral paths and the point of test – has failed to withstand the
applied voltage.
The appliance must be considered unsafe. It should be clearly marked to
show this and withdrawn for full workshop investigation and repair. It must be
FULLY re-tested following repair.
Do not allow bodily contact with the appliance, its supply lead
or the flash probe tip, when the following tests are being
applied.
If, during testing, it becomes necessary to move the
appliance for easier access to a test point – Remove the
probe and release the test button first.