Kikusui TOS9200, Operation Manual

Page: 60 / 172

3-22 Basic Operations TOS9200/9201
The keys can also be used to move the cursor to ON/OFF of the lower
judgement function. If the cursor is at ON/OFF of the lower judgement function, the
rotary knob can be used to make settings.
Turn the rotary knob clockwise: ON
Turn the rotary knob counterclockwise: OFF
Setting the lower current (LOWER)
The lower current can be set between 0.01 mA and 11.0 mA (at a resolution of 0.01
mA for the 0.01 mA to 9.99 mA range, and 0.1 mA for the 10.0 mA to 11.0 mA
range).
When the lower judgement function is set to ON and the measured current is at or
below the lower current, the test ends with a FAIL judgement.
If the
fl uctuation of the leakage current of the DUT is limited and the leakage cur-
rent is suf fi ciently high to enable the tester to make a judgement, set the lower cur-
rent below the smallest fl uctuation. Making this setting makes it possible to identify
a DUT that contains an exceptionally small leakage current, and even to detect a dis-
connection and failed contact in the test leadwire, thus ensuring a high-quality with-
standing voltage test. If the lower judgement function is not to be used, turn it off.
If the cursor is at the lower current, the rotary knob can be used to make settings.
1. If the lower current is not displayed, press the F2 key (LOWER) to dis-
play it. (When the lower current is displayed, the cursor can be moved
using the keys.)
2. Using the keys, move the cursor to the target digit.
3. Using the rotary knob, set the lower current.
• If the lower current is set at or above the upper current while the lower judgement
function is on, “READY” disappears and “UP<=LOW” fl ashes at the top right of
the LCD to indicate that testing cannot be performed (the lower current is factory-
set to 0.10 mA).
Lower the lower current or raise the upper current.
• No lower judgement is made while the voltage is rising or before the WAIT TIME
has elapsed.
VOLT LOWER UPPER TIMER
1.00
kV
0.01
mA
3.0
s
DCW1 DCW1
LOWER ON TIMER OFF
READY
LOWER
F1 F2 F3 F4 F5
SHIFT
NOTE