Seaward B433R User Manual
Page 15
Operating Procedures
15
T es t P r ocedur e
7.
Before applying an Earth Bond test, first visually inspect the product, as far as possible, to ensure that all
earthed parts, including associated wiring, are mechanically sound and free from obvious defects or damage.
8.
Connect the Earth Return clip lead to the main Earthing terminal of the product.
9.
Firmly apply the Earth Probe to exposed, unpainted metalwork on the product for 2-3 seconds and check that
the green PASS lamp on the probe lights – this will indicate that the resistance of the Earth path is generally
satisfactory. Observe the meter indication, the pointer should be below 0.1 ohms and within the uncoloured
zone of the scale. Release the probe, to end the test, within 5 seconds.
10.
If the green PASS lamp fails to light within the 2-3 seconds, repeat the test and check the meter reading – if it
is within the amber zone (up to 0.5 ohms) this may be satisfactory - depending on type of item under test and
any applicable standards.
Readings in the red zone, (above 0.5 ohms) should generally be considered as unsatisfactory and may indicate
loose or broken Earth wires, loose or corroded joints or even missing Earth wires.
11.
Repeat the test at each designated test point on the product.
END