TOS9213S/ TOS9213AS
5-35
Turning the contact check ON/OFF
When the optional high-voltage scanner TOS9221 (with the contact check function)
is connected to the tester, the continuity between the test leadwire and the DUT with
the HIGH or LOW terminal can be checked prior to the application of a test voltage.
To do so, turn on the contact check function.
With the high-voltage scanner TOS9220, a check is conducted on the continuity
through to inside of the scanner only.
Use the SHIFT + F5 keys to turn the contact check function on/off.
Each time the SHIFT + F5 keys are pressed, ON and OFF alternate, regardless of
the location of the cursor. The cursor moves to CONTACT CHECK.
Using the
key, move the cursor to the right of CONTACT CHECK. Settings can
also be made using the rotary knob.
Turn the rotary knob clockwise
: ON
Turn the rotary knob counterclockwise : OFF
Press the IR key to return to the IR1 screen, and then press the START switch.
READY then disappears on the LCD, and a contact check starts for each channel.
The test starts as soon as the continuity is confirmed, and continues until the test
time preset on the timer has elapsed or the STOP switch is pressed.
Fig.5-10 Contact check
The contact check time is calculated using the following formula:
Contact check time = 260 ms + 60 ms x (number of channels set to HIGH or LOW)
When a continuity error is detected in a contact check, “
→←
FAIL” appears at the
top right of the LCD. On the high-voltage scanner, the LED of the failed channel
lights up in orange.
(CHn)
Contact Check n
(CH1)
Contact Check 1
TEST
HV ON
VOLT LOWER UPPER
TIMER
10
V
0.01
M
3.0
s
IR1
IR1
LOWER
LOWER
ON
UPPER
OFF
TIMER
ON
→←
FAIL
−
