Chapter 6 TEST PROCEDURES
6-3
6.1.2 Setting the Upper Cutoff Current
This procedure is to set the upper cutoff current — criterion for pass/fail judgement on the DUT. If the
leak current that flows through the DUT is larger than this limit, the DUT is judged to be FAIL.
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
Select the upper cutoff current setting mode with the
UP/LOW
key
13
and the
UPPER message
23
will appear and the preset upper limit current will be indicated
on the CURRENT readout
22
.
Step 2
Adjust the preset upper cutoff current value as you may require, with the
keys
12
. If you press the
SHIFT
key
16
at the same time, the adjusting speed is increased
by a factor of 10. The current value is displayed on the CURRENT readout
22
.
Upper Cutoff Current Setting Range
Model Upper cutoff current range
TOS5101 0.1 to 55mA
TOS5051 0.1 to 110mA
TOS5050 0.1 to 110mA
Resolution and Display Formats
Upper cutoff current range Basic resolution Display format
0.1 to 9.9mA 0.1mA □.□mA
10 to 110mA 1mA □□□mA
Caution
• The
keys
12
are enabled when the Tester is in the READY
status (status that the READY message
28
appears) and the
KEYLOCK massage
33
has disappeared. It is disabled when in the
TEST-ON status (status that the TEST message
29
appears) or when the
Tester is delivering the result of PASS/FAIL judgement (when the
PASS message
30
or the FAIL message
31
appears).
• 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.
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