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Section
III
Figure
3-2
Model 4342A
1.
2.
3.
4.
5.
METER ZERO AD<J:
This
trimmer
adjust-
ment electrically
zero-sets
the meter
pointer
so that
it
is exactly
over
the
zero calibration
mark when the instru-
ment is on.
FUSE:
Instrument
power fuse
is in-
stalled
in this
fuse holder.
Appro-
priate
current
rating
for
the fuse
re-
quired
is labeled
on the rear
panel.
VOLTAGE SELECTOR: This
slide
switch
selects
the
appropriate
ac operating
power voltage
(115V or 230V +lO%).
Selection
of the
ac voltage
must be
made before
the instrument
is connect-
ed to power line.
LINE Receptacle:
Male ac power line
receptacle
with
center
ground
pin
for
powering
the instrument
from a 115V or
23OV, 48 - 440Hz line.
Before
con-
necting
power cord
(furnished),
VOLT-
AGE SELECTOR @ should
be properly
set.
OVER LIMIT
DISPLAY TIME Switch:
This
slide
switch
sets
"OVER LIMIT"
annun-
ciation
time
for
Go/No-Go checks to
either
1 second
(1 set)
or to contin-
ous (00).
6.
7.
8.
9.
OVER LIMIT
SIC. OUTPUT Connector:
Relay contact
output
for
Go/No-Go
checks.
Center
and outer
conductors
of this
BNC connector
are internally
short-circuited
when measured
Q value
exceeds
the
limit
value
set by the Q
LIMIT
control.
Q .4NALOG OUTPUT Connector:
0 to 1v
analog
output
proportional
to meter
deflection.
Output
impedance
is ap-
proximately
1kR.
FREQUENCY MONITOR Connector:
This
BNC
connector
provides
a portion
of inter-
nal
oscillator
output
for
monitoring
oscillator
frequency
with
external
e-
quipment
(such as a frequency
counter).
Output
level
is 17OmVrms min.
and
output
impedance
is 50R.
Measurement
Terminals:
These six
binding
post
terminals,
including
the
two shield
terminals,
provide
the con-
nection
capabilities
for
attaching
the
unknown sample as well
as supplemental
inductors,
auxiliary
capacitors,
and
other
devices
and accessories
used in
making measurements.
1
Figure
3-2.
Rear Panel Controls
and Connectors.
3-4
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Troubleshooting
