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MODEL 153
2-1.
FRONT PANEL CONTROLS AND TERNINALS.
METER Switch.
a.
t
u
s
r
ment ;
this a l so
H
METER + and
m e nt.
operation
for center
zero
h.
FUNCTION Switch.
n
current i
d one for
a
proximately 2
megohms .
the
mum for
range
being
t
io ns as an ammeter.
RANGE
c.
Switch.
n
o
e of 17 voltage and 21 c
to full-scale deflection
ZERO
d.
Control.
20 microvolts, so it
higher ranges use a 1000:1 divider,
It
range.
has much les s effect on other ranges.
e.
INPUT Receptacle.
Its center terminal is t he circui t high;
nector.
cuit ground ) ; the outer shield is chassis ground.
2-2.
REAR PANEL
CONTROLS
OUTPUT ADJ
a.
DC
Both the output voltage and res1stance vary W1tn the control setting.
0
1.05
from
to
volts; output resis t ance varies to
Binding
b.
Output
f·-:'r
case ground;
LO is circuit ground;
is
; ;",:
link
for connecting the
c.
117-234 Switch.
or
234-volt ac power lines.
d.
FUSE.
For 105-125 volt operation, use a
210-250 volt operation, use
e.
The 3 - wire power cord with the
Power Cord.
g r
n
d connection for the cabinet.
o u
p rovided.
The
153
INPUT
Model
nect
bnc-type connectors to it may damage both.
SECTION 2.
The METER
Switch
has
short
the meter, allowing accurate mechanical
circuits
ER
- determine meter pol a rity .
E T
( l ower meter s cales ) .
The FUNCTION Switch has three positions,
pu
In
VOLTS INPUT R- 2M
t h e
n
ts .
OPE
In the VOLTS R
-
used.
(See
Table
RANGE Sw
h
The
selects the full-scale instrument
itc
u
ent
ranges .
r r
for
range
the
selected with th e RANGE Switch.
ZE
O
Control allows precise meter zeroing.
The
R
s
i
most effective on the microvolt
the Control 1s also somewhat effective
The
INPUT
Receptacle is
AND
TERMINALS.
Control
Control.
This
Posts.
Three posts
HI is
LO
to
Post
The screwdriver - operated slide switch sets the Model
1/4
a
ampere,
An
adapter for operation from 2 - terminal o utputs is
Receptacle is a Tr i axial connector.
OPERATION
four positions.
POWER
CENTER ZERO
position,
N position, input resistance is at
1 .)
In
the MIPS posi
10
the
The
or
3
of
ranges.
a
Teflon-insulated
the inner shi e ld is circuit
sets the amplitude of
7.5 kilohms
are
used for the I - volt recorder output.
the output connection.
G
t h e
Post.
1/2
ampere,
3
3 AG
Slow Blow fuse.
NEMA
approved 3 - prong plug provides
NOTE
3
OPERATIO:-J
off the in
orr
shuts
zero adjust
sets the
instrument
t\o.'O
for
voltage
resistance
input
the
tion, the Hodel
153
sensitivity for
top meter scale corresponds
r
n
Its
a
e is
g
the 3-volt and
Since
on
the 3-volt
T
i
xi a l
a
type con
r
low (c i
the
output voltage.
Voltage span
maximum.
The
furnished short
153
l
fus e .
AG
w
Slow
B
o
to
Any attempt
con
inputs
is
ap
maxi
func
about
r
is
G is
for 117
For
a
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