Kikusui TOS8040, Руководство по эксплуатации, Страница: 59 / 63

T O S 8040 Appendi x 57
A ppendix
Pro vides guidelines f or c u rr en t de t e ct i o n l o we r r efe r en c e limi t a nd ze ro- s tart swi tc h .
A .1 S etting the Current D etection L ower
R eference L imit
This se ct i o n des cr ibes p r e ca u t i o ns f or m a king l o we r limi t judgmen t s . It a ls o des cr ibes
h o w to se t t he c u rr en t de t e ct i o n l o we r r efe r en c e limi t.
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P recautions for lower limit judgment
I f l o we r limi t judgmen t is en a bled in t he f o ll o wing ca ses , t he t es t r esul t will be
judged in a pp ro p r i at ely a s F AIL.
• Tes t v o l ta ge is se t unde r n o- l oa d co ndi t i o ns .
• Vi rt u a lly n o c u rr en t fl o ws t h ro ugh t he DUT .
Judgment error caused by stray capacity
I n c e rta in ca ses o f high sensi t ivi t y a nd high v o l ta ge A C t es t ing , a c u rr en t fl o wing
t h ro ugh s tra y ca p ac i t ies su c h a s t he t es t le a ds will ex c eed t he l o we r r efe r en c e limi t,
dis a bling l o we r limi t judgmen t. Sin c e n o c u rr en t fl o ws t h ro ugh t he DUT when t he
co nne ct i o n to t he DUT is in t e rr up t ed , t he c u rr en t fl o wing t h ro ugh t he DUT sh o uld
be less t h a n t he l o we r r efe r en c e limi t, whi c h sh o uld r esul t in a F AIL judgmen t.
Ho weve r, if a c u rr en t ex c eeding t he l o we r r efe r en c e limi t fl o ws t h ro ugh s tra y ca p ac-
i t ies , t he t es t e r ’s c u rr en t de t e ct i o n c i rc ui t de t e ct s t h at c u rr en t, a nd t he t es t e r issues a
PA SS judgmen t. F or inf or m at i o n o n s tra y ca p ac i t ies , see “F oot n ot e * 6 ” in “ 10.1
Ba si c Spe c ifi cat i o ns” (p a ge 5 3 ) .
B e a le rt f or co mp r ehensive judgmen t e rror s . Che c k whe t he r t he t es t e r issues a F AIL
judgmen t when t he co nne ct i o n to t he DUT is in t e rr up t ed at t he se tt ing o f t es t co ndi t i o ns .
S etting the current detection lower reference limit:
1 . Set the current detection upper reference limit.
See “Cu rr en t de t e ct i o n uppe r r efe r en c e limi t ” (p a ge 36 ) .
2 . Ad j ust the front panel settings as sho w n in Fig. A -1 .
Fig. A -1 Preparing to Set the Current D etection Lo w er Reference Limit
Tu r n t he VR a ll t he w a y
co un t e rc l oc kwise using a n a djus t men t
s cr ewd r ive r.
Dis a ble l o we r limi t judgmen t.
Se t T I MER to O FF .
L O W E R
O FF
O N
R E F E R E NC E