Kikusui TOS5050, Руководство по эксплуатации

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Chapter 9 SPECIFICATIONS
9-3
Note 1: Pay attention to the limitations on output voltage delivery time as follows: The heat
dissipation of the high voltage generator section of the Tester is one-half of the normal
wattage with respect to the rated output from the viewpoints of size, weight, and cost of the
Tester. Due to this, be sure to operate the Tester within the limits shown in the below tables.
If you operate the Tester exceeding these limits, the thermal fuse in the Tester may blow out.
TOS5050
Ambient Upper cutoff
Pause period
Maximum allowable
temperature t current I (mA) continuous test period
t
≤
40˚C 50 < I
≤
110 Not less than test period
≤
30 min
(t
≤
104˚F)
I
≤
50 Not required Infinite
Note 2: When the nominal power supply voltage can be maintained with the output shorted.
Note 3: Test voltage waveform:
When an AC test voltage is applied to a capacitive DUT, it is possible that the voltage
becomes higher even than that when in the no load state. Furthermore, waveform distortion
also may occur if the capacitance of the DUT is voltage-dependent (such as of ceramics
capacitors). When the test voltage is not higher than 1.5kV and the capacitance is not larger
than 1000 pF, such test voltage changes are only of negligible levels.
Note 4: When in the AC mode, the current which flows through the stray capacitances of the test
leadwires, test jigs, and other items on the test circuit also causes measuring errors. The total
judgement accuracy is the sum of this current and the above-mentioned judgement accuracy.
Approximate values of such currents are shown in the following table. Note that, in high-
sensitivity high-voltage test, the current which flows through the stray capacitances may
become larger than the preset lower cutoff current and the LOWER PASS/FAIL judgement
may not be successfully done.
Output voltage 1kV 2kV 3kV 4kV 5kV
When 350-mm-long test leadwires are used 2
µ
A 4
µ
A 6
µ
A 8
µ
A 10
µ
A
being suspended in air
When accessory test leadwires TL01-TOS are 16
µ
A 32
µ
A 48
µ
A 64
µ
A 80
µ
A
used (typical)
When other test leadwires than the above are used, the values of the currents may differ
depending on the conditions.
Note 5: In order to be able to make a FAIL judgement when in the state that the output terminals are
shorted, a certain minimal level of no-load output voltage is necessary due to the internal
resistance of the output circuit. This item indicates such minimal output voltage.