Seaward B255 - Manual (Page 24)

Operating Manual Clare B255 Power Tool & Appliance Test Station
20
Switches and Function Selectors
Ensure that all switches, including rotary selector devices, operate smoothly
and in the expected manner.
Set supply switches to the ON position in preparation for the Safety Test.
Multi-function appliances, such as a two heat/two speed heater, will require
testing in each operating mode.
Any fault or irregularity found by the visual inspection must be corrected
BEFORE electrical testing is carried out.
Electrical Safety Tests – General
Remember –
Plug the power cord of the product to be tested into the appropriate 230V/13A
or 110V/16A socket on the Test Output Box. Various other test socket
combinations can be supplied as optional extras or, alternatively, adaptors to
convert the relevant socket to suit other equipment plug styles can be used if
required.
If intending to apply Earth Leakage and Load (Run) tests to 110V equipment,
ensure that a suitable external 110V safety isolating supply is connected to the
110V/32A Inlet on the back panel of the test set.
The B255 is mainly intended for single phase equipment but can be used for
applying the Safety tests (Earth and Flash) to 3 phase equipment using
appropriate adaptors, however this instrument CANNOT be used to apply the
Leakage and Load (Run) tests to 3 phase equipment.
Earthed (Class I) Equipment
Earth Test
Set the Test Selector to the Earth Test position.
Attach the green clip lead from the instrument to clean exposed metal on the
appliance. Good connections are essential for accurate measurement and to
prevent any high current sparks occurring when the test button is depressed.
Depress and hold the PRESS TO TEST button for 5 seconds whilst observing
the EC Ohms scale of meter.
For most power tools and appliances, the meter reading will be below 0.1
Ohm (within the white zone). Readings up to 0.5 Ohms (within the orange
zone) may be acceptable - particularly when supply leads up to 5 metres in
length are included, although this may also be dependent on the cross-
sectional area (csa) of the conductor being used.
Electrical safety testing can be dangerous.
Ensure that you are aware of all potential hazards.