Kikusui TOS5050A, Руководство по эксплуатации

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6-4 TOS5051A/5050A
Setup procedure
1. Select the lower cutoff current setting mode with the UP/LOW key.
The “LOWER” message will appear, and the preset lower limit current will be
indicated on the CURRENT readout.
2. Adjust the preset lower cutoff current value as required, with the or key.
If you press the SHIFT key at the same time, the adjusting speed is increased
by a factor of 10. The current value is displayed on the CURRENT readout.
3. While holding down the SHIFT key, press the UP/LOW key and the
lower pass/fail judgment function will be brought into effect and the
“LOWER ON” message will appear.
Lower cutoff current setting range
0.1 mA to 110 mA, OFF
Resolutions and display formats
• The keys are enabled when the tester is in the READY status (status that the
“READY” message appears) and the “KEYLOCK” message is OFF. It is disabled
when in the TEST-ON status (status that the TEST message appears) or when the
tester is delivering the result of PASS/FAIL judgment (when the “PASS” message
or the “FAIL” message appears).
• Because the upper and lower cutoff currents can be set independently, it is possi-
ble that the latter is set to a value higher than the former. If such setting is used
and the pass/fail judgment function for the lower cutoff current is ON, “mA” (unit
of current measure) blinks and the “READY” message disappears to indicate that
such test condition is not allowed. 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 judgment function for the lower cutoff current is turned OFF.
• When you turn OFF the POWER switch immediately after you have changed the
cutoff current, no setting value may be stored. Wait for fi ve seconds or more after
the setting change, and then turn OFF the POWER switch.
• As noted in section 10.1, “Basic Performance”, when a test is done with a high
AC voltage and a high sensitivity, the lower pass/fail judgment may not be cor-
rectly done in a particular case that the output current that
fl ows due to the stray
capacitances of the output circuit (such as test leads, 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 judgment. In the above particular case, how-
ever, as the output current is larger than the preset lower cutoff current, the tester
will give a PASS judgment even when no DUT is connected. Be careful when
using the pass/fail judgment function. Take into consideration the various factors
that can affect the reliability of judgment. Before starting tests, disconnect the
DUT and be certain that the FAIL judgment is correctly done.
Lower cutoff current range Basic resolution Display format
0.1 mA to 9.9 mA 0.1 mA X.X mA
10 mA to 110 mA 1 mA XXX mA
NOTE