Seaward A252 User Manual
Page 24
A252 Portable Appliance Tester TEST PROCEDURES
F
LASH
T
EST
- E
ARTHED
A
PPLIANCES
Although all tests can be applied independently it is advisable, when testing earthed equipment, to ensure
that there is a satisfactory earth path BEFORE applying a Flash Test .
Connect the appliance into the appropriate test socket and select the 1250V Flash Test.
Depress the TEST button and observe the Flash Test lamps, the green PASS lamp should come on to
indicate a satisfactory test.
If the warning buzzer sounds continuously and the red Flash FAIL lamp comes on, one of the following
conditions is indicated -
• the insulation is unsatisfactory, permitting a leakage current in excess of the nominal 5mA.
• a flash-over has occurred between the Earth path and one or other of the Line and Neutral paths.
The appliance should be considered unsafe, clearly marked as such and withdrawn for full workshop
investigation and repair. It must be FULLY re-tested before being returned to service.
If the failure is thought to be caused by the presence of a high leakage suppression filter, an extra long
supply lead or a high brightness neon in the supply circuit, - giving rise to a total leakage current in excess
of the nominal 5mA - it may be permissible (on the advice of the appliance manufacturer) to re-apply the
test at the lower setting of 500V or using the higher 10mA trip threshold.
D0010024.DOC (01/01/94) Page 24 INSTRUCTION MANUAL