25
CAUTION
Where DUT ON Check function detects that DUT is off, blinking
”OFF?”
appears in the LCD and the test is stopped. Turn on the DUT; then the
Tester automatically resumes the test. Depending on DUTs, even they are
turned on, blinking
”OFF?” warning sometimes doesn’t disappear and the
Tester cannot continue the test automatically. In such a case, press CL I
switch to continue the test.
Follow the procedure described in 4.3.1 and undertake the NULL setting
before a measurement.
The crocodile clip must make good contact with the enclosure of the
appliance.
Do not touch the appliance under test whilst testing is in progress. Since a
high voltage of 250V/500V will be present and the user may get an electrical
shock.
When the terminal is open or the resistance value exceeds the measuring
range, “ > ” (over range display) appears on the LCD.
5.3 Class
ll
Test
The Class ll appliances have the indication of
“DOUBLE INSULATION” or the
symbol.
Class II test is performed to confirm insulation resistance and leakage current of
the appliance are within the allowable range specified in the related standard.
The Tester provides two different measurement methods to measure leakage
current flowing on exposed metal parts of Class ll
appliance. One is “RUN leakage
current” test with the Tester connected to an outlet, and another is “SUBSTITUTE
leakage
current (SUB leak current)” test without connecting the Tester to an
outlet.
To perform Class II test, connect the mains plug of the appliance to the test socket
(1) described in clause 2.4.3. Connector and the PE probe to terminal (3). To
perform RUN leak test, connect Mains lead EZYMAIN to Main cord terminal (2).
Use the following setups, depending upon the type of appliance.
While the Tester is supplied power via Mains lead EZYMAIN, RUN leak test is
automatically performed. If the EZYMAIN cord is not connected and used, the
Tester performs SUB leak test.
