Note:- During the test, a display of indicates Open
circuit. Check that the appliance is switched On, that any
fuses fitted are good, the continuity of the power cord is
good and that the appliance itself is not open circuit.
Appliances with a switch mode power supply may indicate
Open circuit. In this case, omit the Circuit test.
Note:- If the appliance circuit appears to be Open circuit,
fuses (if applicable) may be checked as follows:
Fuse Check
1. Remove the suspect fuse from the appliance.
With the ‘Home‘ screen displayed (no switches
pressed) press the suspect fuse across the
contacts.
A good fuse is indicated by the display of
accompanied by a continuous beep note.
Earth Continuity Test (Class I appliances only)
1. With the ‘Home‘ screen displayed (no switches
pressed) connect the Earth Bond test lead to
the 100mA terminal.
2. Firmly connect the crocodile clip to the metalwork of
the appliance.
3. Earth continuity resistance is displayed directly
in m .
4. Disconnect the Earth Bond test lead.
Earth Bond Test (Class I appliances only)
1. With the ‘Home‘ screen displayed (no switches
pressed) connect the Earth Bond test lead to
the 10A/25A terminal.
2. Firmly connect the crocodile clip to the
metalwork of the appliance.
3. Press and hold either the 10A or the 25A test
switch. The Earth Bond screen is displayed.
4. Earth Bond resistance is displayed directly in
m .
5. Release the Test switch.
6. Disconnect the Earth Bond test lead.
A successful test is indicated on the solid scale line and
the word PASS is displayed.
As a general rule, an appliances should have an Earth
Bond resistance of less than 100 mΩ. Appliances with
long supply leads will give higher readings due to
conductor resistance. Corrections may be applied if lead
11
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