BRUEL & KJAER 2230 User Manual

Before starting any measurement carry out a display check and a calibration check
using the internal reference signal, see section 3.4.
Note:
It is possible to switch between all DISPLAY settings without interrupting any
measurement started. When measuring low levels it is recommended to move the DIS-
PLAY and PAUSE selectors smoothly, as the clicking noise produced may introduce
errors. This is irrelevant when measuring higher levels.
For measurements of SPL up to 150 dB, the Input Attenuator ZF 0020 has to be fitted
between the Microphone and the input stage (see Fig.3.3). When the Attenuator is
fitted a 20 dB correction is automatically applied by the Sound Level Meter. The dis-
played value thus corresponds to the real SPL and no correction has to be applied.
WARNING: Exposure of personnel to high sound levels is dangerous to health unless
adequate ear protection is worn.
3.5.4. Sound Pressure Level Measurements
Switch on the Sound Level Meter and select "Operate". Set EXT. Filter "Out". Set other
switch functions to suit measurement conditions and to conform to the appropriate
standard. Set DISPLAY selector to "SPL".
3.5.5. SEL Measurements
For SEL measurement select the following settings:
POWER:
REF .-OPERATE:
EXT. FILTER:
TIME WEIGHTING:
DETECTOR:
DISPLAY:
"On"
"Operate"
"Out"
"Fast"
"RMS"
"SEL"
Set other switch functions according to measurement conditions and to conform to the
appropriate standard. To start measurement press RESET "All". At the end of the
measured event read the digital display. Freezing the display by setting the Sound
Level Meter to "Pause" allows time for writing down the results.
3.5.6. Leq Measurements
For Leq measurement select the following settings:
TIME WEIGHTING:
DETECTOR:
REF
.-OPERATE:
EXT. FILTER:
POWER:
DISPLAY:
"Fast"
"RMS"
"Operate"
"Out"
"On"
"Leq"
Any different choice for the two first settings is unsuitable and will cause the display of
a non-resettable "t". Set other parameters according to measurement conditions and
to conform to the appropriate standard.
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BRUEL & KJAER 2230 Specifications

General

Brand	BRUEL & KJAER
Model	2230
Category	Measuring Instruments
Language	English