Kikusui TOS5050A, Руководство по эксплуатации

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8-4 TOS5051A/5050A
8.2 Zero-turn-on Switch
If a regular mechanical contact type relay is used for on-off control operation of the
primary circuit of the high voltage transformer, transient spike voltages may be pro-
duced, thereby applying an abnormal high voltage to the DUT and causing a possi-
bility of rejecting an acceptable DUT or damaging it. The zero-turn-on switch,
which employs a solid-state switching circuit, turns on and off the power line at
approximately 0 volt level, thereby reducing transient overshoots.
Fig. 8-2 Timing chart
• Be sure to observe the following instructions when using a HV test probe
(HP01A-TOS or HP02A-TOS).
Do not connect the probe to or disconnect it from the DUT while letting it
deliver the test voltage. If you do, the effects of the “zero” switching may be
lost and the DUT may be damaged. Be sure to turn-on the test voltage
after connecting the probe to the DUT and to disconnect the probe from
the DUT after turning-off the test voltage.
Start signal
Stop signal
Test signal
Test voltage waveform
when mechanical relay
is used
Test voltage waveform
when zero-turn-on
switch is used
CAUTION