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The weighting network used should always be stated when reporting results, e.g.,
60 dB (A), 60 dB (D), etc.
For further information on sound measurements, the B
&
K booklet, "Acoustic Noise
Measurements" is available on request.
3.5. VIBRATION MEASUREMENTS
1.
Calibrate the 2010 and the accelerometer as described in section 3.2.2.
2.
Mount the accelerometer on the measurement object (for recommended methods,
see the Accelerometer Theory and Applications Handbook).
3.
Keep the 201 0 as far away as possible from the vibration environment and any
other unwanted influences.
4.
With the OUTPUT SECTION ATTENUATOR in
"x
1" position, adjust the INPUT SEC-
TION ATTENUATOR until a suitable deflection is obtained without any indicated over-
load. If the deflection is insufficient, even when the INPUT SECTION ATTENUATOR
is in its "1 0 mV" range, then adjust the OUTPUT SECTION ATTENUATOR.
If the INPUT OVERLOAD light flashes, turn the INPUT SECTION ATTENUATOR
switch to a higher range.
5.
For further information on vibration measurement, the B & K booklets "Mechanical
Vibration and Shock Measurements" and "An Introduction to Vibration Measure-
ments" are available on request.
3.6. SELECTIVE MEASUREMENTS
For selective sound, vibration or voltage measurements between 2Hz and 200kHz using
a selected bandwidth and effective averaging time, the procedure is as follows:
1.
Carry out the appropriate calibration procedure as described in section 3.2.
2.
Connect the appropriate transducer and preamplifier to the 2010.
3.
Set the controls as follows:
FREQUENCY RESPONSE
SELECTIVITY CONTROL
EFFECTIVE AVERAGING TIME
B & T PROGRAM
OUTPUT SECTION ATTENUATOR
BANDWIDTH COMP.
GAIN CONTROL
"Selective"
As required
As required
"Manual"
"x
1"
If necessary
"Cal."
4.
Turn the frequency scale pointer to the frequency of interest, and set the frequency
range switch accordingly. If necessary, fine tuning can be carried out using the FRE-
QUENCY INCREMENT knob.
5.
Adjust the INPUT SECTION ATTENUATOR until a suitable meter deflection is ob-
tained without any indicated overload. If the deflection is insufficient, even when
the INPUT SECTION ATTENUATOR is in its "1 0 mV" range, then adjust the OUTPUT
SECTION ATTENUATOR.
33
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