TOS9213S/ TOS9213AS
3-5
When no DUT is connected, the tester itself requires the following lengths of time to
reduce the internal capacitor voltage to 30
V
.
Assuming that a 0.05
μ
F capacitor is tested, the following lengths of time are
required to reduce the charge to 30
V
.
If the DUT is disconnected during a test or before the completion of discharging,
assuming that the DUT has a capacity of 0.01
μ
F and a parallel resistance of 100
M
Ω
, approximately 6 seconds at 10 k
V
and approximately 3.5 seconds at 1 k
V
are
required for the DUT to discharge to 30
V
.
When the approximate time constant of the DUT is known, the time
required for
discharging to 30
V
after the output is cut off is calculated as the time constant times
the value given above.
3.5
Dangerous States of Failed Tester
Typical possible dangerous states of the tester are as shown below and in which
cases the most dangerous situation that
“the high test voltage remains delivered
and won't be turned off!”
may occur. When this situation has occurred, immedi-
ately turn OFF the power switch and disconnect the AC power cable from the AC
line receptacle.
• The DANGER lamp does not go out despite you have pressed the
STOP switch.
• The DANGER lamp does not light up despite the pointer of the ana-
log voltmeter is deflected indicating that the output voltage is being
delivered.
Also when the tester is in other malfunctioning states than the above, there is a pos-
sibility that the output voltage is delivered irrespective of your proper operating pro-
cedure. Never use the tester when it has failed.
•
Keep the tester a
w
ay of other people
u
ntil yo
u
call o
u
r ser
v
ice engineer for
help.
• Immediately call Kik
u
s
u
i distri
bu
tor/agent. It is hazardo
u
s for an
u
nq
u
ali-
fied person to attempt to tro
ub
leshoot any tester pro
b
lem.
•
Insulation resistance testing at 1000
V
:
Approximately 0.5 ms
•
DC withstanding voltage testing at 10 k
V
: Approximately 50 ms
•
Insulation resistance testing at 1000
V
:
Approximately 5 ms
•
DC withstanding voltage testing at 10 k
V
: Approximately 190 ms
WARNING
