2230/2317
Internal
Sound
Source
Pistonphone
+
Int. Ref. +
4230 +
Settings
Reference 4230
Attenuat
.
or
Attenuator
Attenuator
REF.-OPERATE
"Ref."
"Operate"
"Operate"
"Ref."
"Operate"
FSD
"11
0"
"110" "(140)" "(11 0)"
"(110)"
RESET
"All" "All"
"All"
"All"
"All"
FREQ. WEIGHTING
irrelevant irrelevant
"Lin."
irrelevant
irrelevant
EXT. FILTER
"Out"
"Out"
"Out"
"
Out"
"Out"
SOUND INCIDENCE
"Frontal" "Frontal"
irrelevant
"Frontal"
"Frontal"
DISPLAY
"SPL"
"SPL"
"SPL"
"SPL"
"SPL"
TIME WEIGHTING
irrelevant
irrelevant irrelevant
irrelevant
irrelevant
DETECTOR
"RMS"
"RMS"
"RMS"
"RMS" "RMS"
POWER
"On"
"On"
"On"
"On"
"On"
PEN LIFT & STAND
BY
Out
position
Out
position
Out
position
Out
position
Out
position
SIGNAL MODE
"AC
Log."
"AC
Log."
"AC
Log."
"AC
Log."
"AC
Log."
AC AVERAGING
"Fast"
"Fast"
"Fast"
"Fast"
"Fast"
AC
DYN.
RANGE
"SO
dB"
"SO
dB"
"SO
dB"
"SO
dB"
"SO
dB"
DC OFFSET
irrelevant
irrelevant
irrelevant
irrelevant
irrelevant
FINE SENSITIVITY
"Cal."
"Cal."
"Cal."
"Cal." "Cal."
PAPER SPEED
"1
mm/s"
"1
mm/s"
"1
mm/s"
"1
mm/s"
"1
mm/s"
COARSE SENSITIVITY
"316mV"
"316mV"
"316mV"
"316mV"
"316mV"
PAPER DRIVE
On On On
On On
POWER
On On
On On On
PEN SPEED
"Normal"
"Normal"
"Normal"
"Normal"
"Normal"
T00839GBO
00000000000000
00000000
JOOOOOOOO[
000000000
000000000
000000000
Scale
top
Scale
bottom
Qp
0102
100
100
130
--f-6dB-
100
100
-------+-
6 dB
Ko
6,2
dB-
----------f- 6 dB
Ko
-
---t-
6,2 dB
==:
90
©
90
©
120
©
90
©
90
©
80
80
110
80
80
70
70
100
70
70
60
60
90
60
60
50
50
80
50
50
850988
Fig. 4.6.
AC
Recording
Calibration
settings
The
correct
reference
deflection
"C"
should be
obtained
automatically
with
sufficient
accuracy
(if a Pistonphone
or
Sound Level
Calibrator
is used,
it
must
first
be set
to
"On"). If not,
it
may
be due
to
an inaccurate
calibration
of
the Sound Level
Meter
or
of
the Level Recorder.
Check
and
correct
if necessary
the
Sound Level
Meter
calibration
(see
section
3.4). If the
inaccuracy
is due to the Level Recorder, select a COARSE
SENSITIVITY
of
"1
00
mV"
and adjust the FINE SENSITIVITY until the pen settles
at
the
correct
reference
position
below
full scale on paper.
To
increase the
calibration
accuracy, the "Reduced" PEN SPEED
may
be used
during
the
calibration
procedure.
Remember
to return to
"Normal"
PEN SPEED
before
proceeding
to record measurements.
By using the "316
mV"
setting full scale
deflection
on
paper
corresponds
to
full scale
deflection
on the Sound Level Meter minus 10 dB. The
recording
span can be
shifted
(for
example
from
50-100 dB
to
40-90 dB) by changing the COARSE SENSITIVITY setting (in
the
example
from
"316 V"
to
"1
00 mV"). Changing the FSD
setting
on the Sound Level
Meter
shifts the full scale on
paper
by the same amount.
25
To Next Page
Loading...
