Kikusui TOS5050, Руководство по эксплуатации

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Chapter 6 TEST PROCEDURES
6-5
• The upper and lower cutoff currents can be set mutually independently
and therefore it is possible that the latter is set at a value higher than the
former. If this is the case and the pass/fail judgement function for the lower
cutoff current is ON, however, the
mA
display (unit of current measure)
blinks and the
READY
message 28 disappears to indicate that the test in
this condition cannot be done. The READY status resumes and the blinking
stops if the lower cutoff current is set at a value lower than the upper cutoff
current or if the pass/fail judgement function for the lower cutoff current is
turned OFF.
• As noted in Chapter 9 “SPECIFICATIONS” (Note 4 for TOS5050 and
Note 5 for TOS5101 and TOS5051), when a test is done with a high AC
voltage and a high sensitivity, the lower pass/fail judgement may not be
correctly done in a particular case that the output current that flows due to
the stray capacitances of the output circuit (such as test leadwires, etc.) is
larger than the preset lower cutoff current. Normally, if no DUT is
connected, since no end-load current is drawn, the output current should
be smaller than the preset lower cutoff current and the Tester should
deliver a FAIL judgement. In the above particular case, however, as the
output current is larger than the preset lower cutoff current, the Tester will
give a PASS judgement even when no DUT is connected. Be careful when
using the pass/fail judgement function — take into consideration the
various factors that can affect the reliability of judgement. Before starting
a tests, disconnect the DUT and be certain that the FAIL judgement is
correctly done.
6.1.4 Setting the Test Time
This procedure is to set the test period of time during which the Tester remains in the TEST-ON status
(status that the Tester delivers the test voltage). When this period has elapsed without any FAIL
judgement, the Tester terminates the test and gives a PASS judgement. You can turn OFF the timer
function if you don’t need it.
Caution • Test time and pause period are limited by setting upper cutoff current.
"ON
…
" of the front panel character shows a maximum test time and
"OFF
…
" shows a minimum pause period. For details, refer to chapter 9
"Specifications" (Pages 9-2, 9-3, 9-9 and 9-10).
Setting Procedure
Step 1
Adjust the preset test period with the keys 14 . If you press the
SHIFT
key 16
at the same time, the adjusting speed is increased by a factor of 10. The test period is
displayed on the TIME display
26
.
Step 2
To turn ON (or OFF) the timer function, press the ON/OFF key
15
. When it is
turned ON, the
TIMER ON
message
27
appears.