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Model 4440B
Section IV
Paragraphs 4-1 to 4-8
SECTION
IV
MAINTENANCE
4-1.
INTRODUCTION
e.
As a permanent recordof the instrument main-
4-2,
Maintenance of the Model 4440B
should be mini-
tenance perlörmen,
mal
unless an overload
voltage or physical
damages
require
replacement
of a part.
This section
gives
maintenance
and service
information.
Included is a
table of recommended
test equipment,
repair
proce-
dures,
an in-cabinet performance check.
4-3.
TEST EQUIPMENT
4-4.
Table 4-1 lists recommended test equipment for
maintaining and checking performance of the
instru-
ment.
Test equipment having equivalent characteris-
tics may be substituted for equipment listed.
4-5.
4-6.
proper
operation of the instrument and also may
used:
IN-CABINET
PERFORMANCE
CHECK
The performance
check
can be used
to verify
be
a,
As part of an incoming inspection check of in-
strument specifications.
b.
Periodically,
for instruments used in systems
where maximum
reliability is important.
c.
As partof a procedure to locate defective com-
ponents.
d.
Afterany repairor adjustment, before returning
instrument to regular service,
FREQUENCY
dial. .... 1 kHz
MAXIMUM
OUTPUT
switch...
30V, 130mA
OUTPUT
LEVEL......
12 o'clock position
4 F Dial
0
GAIN dial... „nee ene cine
METER
switch
.......
FILTER
FREQUENCY
switch....
200Hz - 2kHz
FILTER
TUNING dial..
Set around the scale
10 to maximize
the
meter deflection.
12 o'clock position
DETECTOR
(GR
1232—A)
OSCILLATOR
(GR
I3li-A)
$
9
©
O)
Й
0000
Hd
©
оо
SPECIAL MEASURING
CABLE
GR-BNC
ADAPTER
1250-0850
4440B
00000
00000
CAPACITANCE
BRIDGE
(GR i615—A)
Figure 4-3.
4440B-1
Performance
Test Setup
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