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BRUEL & KJAER 2305 - Statistical Distribution Analyzer Type 4420

BRUEL & KJAER 2305
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Fig. 4.18.
Photograph
of
the
Motor Drive
UM
1018
mounted
on
th
e
Lev
el
Recorder
.
synchronism
is
thereby
obtained
in
both
forward
and
backward
sweep
directions,
and
for
any
number
of
sweep
cycles.
The
motor
is
screwed
onto
DRIVE
SHAFT
II
of
the
Level
Recorder
after
removal
of
the
gear
wheel
shown
in
Fig.
4.19
and
connected
to
the
generator
as
shown
in
Fig.
4.20.
Dr
i
ve
Shaft
ll.
Remove
this
wheel
26610lt
Fig. 4.19.
Remove
nylon
gear
wheel
as
shown.
Statistical
Distribution
Analyser
Typc
4420.
The
analyser
Type
4420 is
basically
an
accessory
for
the
Briiel
& Kjrer Level
Recorder
.
Though
it
can
also
be
attached
to
other
suitable
recorders
and
indicators
including
the
B & K Noise
Limit
Indicator
Type
2211.
It
resolves
the
recorded
information
into
twelve
class
intervals
and
presents
a
numerical
display
of
the
data.
This
is
done
simulta~eously
with
the
writing
process
of
the
level
recorder
and
so a
paper
record
need
only
be
taken
if
required.
" .
The
twelve
channel
counters
give
the
time
distribution
of
the
recorded
level
which
can
be
used
to
plot
a
histogram
as
shown
in
Fig. 4.22.
60

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