Specifications

2-4 Precautions on Handling TOS9220/9221
2.4 Daily Checking
T o a v oid accidents, confi rm at least the follo wing before starting operation.
Common items f or both the T OS9220 and T OS9221 scanners
• The scanner and tester is connected to an ear th g round.
• The coating of the high-v oltage test leadwire is free from cr ac ks , fi s -
sures , and breakage .
• The high-v oltage test leadwire is not brok en.
F or the T OS9220 scanner
• When a test is star ted at a test v oltage of 0 V with the contact chec k
function set to ON in the tester proper , a CONT A CT F AIL judgment m ust
not be made .
(This inspection chec ks contin uity up to the output rela ys within the scan -
ner . F or more inf or mation, see " Contact chec k function " in "3.2 Connect -
ing the T OS9220 Scanner to the DUT" .)
• When the output v oltage is increased g r adually with the ends of the test
leadwires across the channel used f or a test short-circuited, an UPPER
FAIL judgment must be made.
For the TOS9221 scanner
• Short-circuit the ends of the low-voltage test leadwire (output terminal B)
and high-voltage test leadwire (output terminal A) at each channel.
Then, when a test is started at a test voltage of 0 V with the contact
check function of the tester proper set to ON, a CONTACT FAIL judg-
ment must not be made.
• Open the ends of the low-voltage test leadwire (output terminal B) and
high-voltage test leadwire (output terminal A) at each channel. Then,
when a test is started at a test voltage of 0 V with the contact check func-
tion of the tester proper set to ON, a CONTACT FAIL judgment must be
made.
• When the output voltage is increased gradually with the ends of the test
leadwires across the channel used for a test short-circuited, an UPPER
FAIL judgment must be made.