1-6
TOS9213S/ TOS9213AS
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Rise-time control function
In DC withstanding voltage testing, and insulation resistance testing, a voltage can
be slowly increased until it reaches a required test value, instead of applying the
required test voltage to the DUT immediately after the start of a test. The voltage
rise time can be set to 0.1 s through 99.9 s at a resolution of 0.1 s, and to 100 s
through 200 s at a resolution of 1 s. The start voltage, which is applied at the start of
a test, can be set to 0 % to 99 % of the test voltage at a resolution of 1 %. Thus, the
tester conforms to the requirement for the type certification test under the UL stan-
dard and the withstanding voltage test under the IEC standard that less than half of
the test voltage be applied initially and slowly increased for a specified period of
time before the test voltage is reached.
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Discharge function
Generally, DUTs contain capacitive elements. Therefore, DUTs remain charged
immediately after a DC withstanding voltage test or insulation resistance test has
been conducted, resulting in the danger of electric shock. The tester has a function
for forcibly discharging the DUT upon completion of DC withstanding voltage test
or insulation resistance test. You can set the discharge time to a value between 0 and
300 s.
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Enhanced safety
To enhance safety, the tester is equipped with a number of devices and safety func-
tions, including safe output terminals, a discharge function, and an analog voltmeter
that constantly monitor the output-terminal voltages. Such safety measures also
include a danger lamp that constantly monitors output-terminal voltages even when
no test is under way and lights up when a voltage is detected, in addition to an inter-
lock function that cuts off output in coordination with an external device.
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Voltage hold function
During judgement, this function allows the tester to retain measured voltages
recorded upon completion of a test, while it is still outputting the judgement results.
Combined with the rise-time control function, the voltage hold function enables
detection of the dielectric breakdown voltage.
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Output voltage monitoring function
When the output voltage deviates from ± (10 % of the s50
V
), the monitor-
ing function activates to suspend the test, ensuring highly reliable testing.
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High operability
The tester is easy to operate, allowing the operator to start using it without difficulty.
The tester displays the primary test conditions on the first page of the menu, with
the secondary test conditions shown on the following pages. To set test conditions,
simply use the cursor key to choose from among the items displayed on the LCD,
and then turn the rotary knob. The function keys allow you to jump to items to be
set. During a test, the output voltage can be changed using the rotary knob.
