Keithley 153, Инструкция по эксплуатации, Страница: 41 / 51

MODEL 1 53
MI CROV OLT - AMMET ER
ACCESSORI ES
S E CT I O N 7 .
A C C E S S O R I E S
7 - 1 . MODEL
1 5 3 1 GRI PPING PRO B E ( F i gu r e 2 8) . T h e Mod e l
1 5 3 1
has a g r i p p i n g p r ob e and
a
3
-
f
o o t
t r i a x i a l
c ab l e .
I t
i s
u s e fu l f o r mak i n g
i n - c i r c u i t
m e a s u r e m e n t s . I t s
g r i p p i n g
f e a t ure
i s
u s e fu l
f o r
a t t a c h i n g
t he
Pr ob e
a t
a s i ng l e po i n t f o r r e p e a t ed mea s u r e men t s .
When ma k i ng l O\v- l e v e l mea s u r eme n t s ,
hand l e t h e prob e
b od y
a s
l i t t l e a s p
o
s s ib l e t o avoi d
t
h e rm a l emf ' s . A l l ow t h e c i rcu i t b e ing t e s t e d t o r e a c h t h e r ma l equi l ib r ium b e f o r e ma k i ng
me a s u r emen t s .
Conn e c t th e Prob e p lug d i r ec t l y t o t h e Mod e l
1 5 3 INPUT
Rec e p t a c l e .
T h e
Ke i th l ey
p a r t numb e r f o r
th
e
input cab l e used on
t h e P
r
o
b
e
i s SC- 2 2 ;
t h e numh c r
for
t h e
c a b l e o n t h e
l ow
l ea d i s
SC- 3 2 .
7 - 2 . MODEL 1 5 3 2 TEST LEADS
(F igur e 29 ) .
An
e a s y
\va y
t o
ma k e
c o n n e c t i o n s
t o
t h e
Mo d e l
1 5 3
i s w i t h t h
e Mod e l 1 5 3 2
T e s t Le a d s
s u p p l i e d
w i t h t h e i n s t rume n t . T h e
Lea d s
c o n s i s t
o f a ma t ing c on n e c t o r t o t h e Mo d e l 1 5 3 , a 3 - f o o t
cab l e
a nd
t \W
a l
l
iga
t
o r
c l i ps . I t
i s
d e s ig n e d f o r
r e p e a t e d
me a s u r emen t s . T o r e d u c e th e rma l emf ' s , t he Le a d s a
re o f
a l l
c o p p e r
c on s t ru c t i o n
a n d
u s e l ow- t h erma l c a dmium s o l d e r c o n n e c t i on s . F o r p erma n e n t c o n n e c t i on s ,
r
e
m
o
ve the
a l l ig a t o r c l i p s and a t t a ch t h e l e a d t o a c i r c u i t w i t h l ow- t h e rma l s o l d e r ( Mo d e l
1 50 3 ) o r b y
a
c r imp cOdne c t i on .
C
l
e
a
n
t h e b
a r
e w i r e wi th a
non-me ta l l ic ab ras ive ,
s u c h
a s S c o
t
c
h Bri t e ,
b e f o r e ma king
t h e
c o
n
n e c t
i
o n
.
F o r
crimp
c onn e c t i o n s , u s e t he Mod e l
1 48 3
Ki t . Th e
p lug
on t h e Lea d s ma t e s
wi th the Mod e l
1 5 3 INPUT
Rec e p t a c l e .
FIGURE
28.
Ke i th ley
Instrument s Mode l
1 5 3 1
Gripping
Prob e .
7 · 3 .
MODEL
1 5 33 MATING
CONNECTOR
( Figure
30 ) . Th e
Mod e l 1 533 is
d e s igned t o ma t e
wi th t h e
Mode l
1 5 3 s p e c i a l t r i a x i a l
INPUT
Rece p t a c l e a
n
d t o a c c e p t t
h
e Mod e l 1 5 3 4
T r ia x Cab l e or
any o ther
c ab l e with
0 . 1 4 5 -
inch
o
u
t
e
r
d iame t e r .
7·4.
MODEL
1 5 34 SPECIAL LOW-THERMAL TRIAX
FIGURE 29.
Ke i th ley Ins trume n t s Mod e l
1 5 3 2
T e s t Le a d s .
FIGURE
30 .
Ke i t h l e y I n s t rumen t s Mod e l
1 5 3 3
Ma t ing Conne c t or .
CABLE .
T h e
Mod e l 1 5 34
i s
10
f e e t
o f
l ow-noi s e c ab l e whi c h ha s l e a kage
res i s tance
s u f f i ­
c
ien t
l
y high
t o
m
a
i
n
t
a i
n
the Mod e l
l 5 3 ' s
p e r f ormance s p e c i f i c a t i ons .
V
o
l t a
g e
b r e a k d own
is 1000
vo l t s c e n t e r c onduc t or t o inner
s h i e l d ; 500
vo l t s
b
e
t
we
en s h i e l d s . The C a b l
e
u s e s
cop p e r i n t h
e
s igna l l e ad s . Ou t er
d
i
am
e
t
e
r
of
t h e Cab l e i s 0 . 145
inch .
The
Cab l e
c ome s
wi th no
c onnec tors .
7 - 5 .
ACCES SORY KIT S .
a .
I f cadmium
s o l d e r ( Mod e l
1 50 3 )
i s u s ed for a
c
o n ne c
t
i
o
n , make
s u r e
t h e s o l d e r ing iron
used
i s
c lean
a n d
t ha t
it
h a s
not
b e e n
u s ed
w i t h regu lar
s o ld er b
e
f
o
r
e
.
U s e on l y
r o s in
33