Kikusui TOS5050A, Operation Manual, Page: 27 / 120

TOS5051A/5050A 3-3
Chap
.3
Handling Precautions
When connecting the tester to a DUT (device under test), connect the low test lead
fi rst (and the high test lead next) and be sure that it securely connects the LOW out-
put terminal of the tester to the corresponding terminal (chassis protective ground-
ing terminal) of the DUT. If the connection is inadequate, entire DUT can be
charged up to a hazardous high voltage.
Fig.3-1 Connecting the low-voltage test lead
3.2.3 Connecting the High Test Lead
Be sure to observe the order of lead connections--the low test lead fi rst and the high
test lead next. To connect the tester to a DUT, proceed as follows:
1. Press the STOP switch.
2. Check that the output voltmeter reading is “0”.
3. Check that the DANGER lamp is OFF.
4. Connect the high test lead to the HIGH VOLTAGE output terminal.
5. Short the low and high test leads, and check that high voltage is not
present.
6. Connect the tester to the DUT, with the low output lead fi rst and high
output lead next.
3.2.4 Before Changing Test Parameters
Before changing test parameters, press the STOP switch and be certain that the
TEST VOLTAGE control knob is at the “0” position (fully counterclockwise).
Install the lead clamp like this
LOW output terminal
Test lead (black) to DUT