Keithley 153, Instruction Manual, Page: 30 / 51

S ERVICING
MOD EL
1 5 3 MI CROVOLT - AMMETER
5 - 10 . AC REJECT I ON CHECK .
a .
Op era t e
t h e
Mo d e l
1 5 3 f r om
a
60 - c p s p owe r
l i n e . Us e t h e O s c i l l a ­
t o r t o a p p l y a IO - v o l t p e a k - t o - p e a k ,
60 - c p s
s i g n a l
t o t h e Mod e l 1 5 3
i n pu t . S e t t h e Mo d e l
1 5 3 RANGE Swi t ch
t o
100
MI LLIVOLT S ) a n d
the METER
S\o.]i t c: h
t o
Z ERO C ENT E R . Turn
d own
t h e
Os c i l la t o r o u tpu t amp l i tud e a n d ma ke
s u re
t h e Mod e l 1 5 3
i s p rop e r l y z e ro ed . The re
s hou l d
b e le s s
than 0 . 5% change in the me t er
n e ed l e d e f l e c t i on f r om no s i g n a l
t o f u l l
s i g n a l .
D i s r e g a r d
any t rans i en t
s w i ng s
wh i l e app ly ing t h e
s igna l .
b .
Re O p e r a t e
the Mod e l 1 5 3
f r om a
50 - cp s p ower l ine ,
Fo l l ow
the
i n ­
s t ru c t i o n s
g iven
f o r
th
e
60 - cp s r e j e c t i on che c k
i n
the p r e c: e e d ing sub - p a ragra p h .
22