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3. Adjust the GAIN CONTROL to bring the needle back to the red
mark. The 2010 is then calibrated so that 10 dB must be added to the
value of all meter indications.
4.2. SOUND MEASUREMENTS
1. Calibrate the 2010 and the microphone as described in section 3.2.2.
2. Hold the microphone steadily and at least 1 meter away from the
body, or set it up on a tripod or any other support that will not
interfere with the sound field.
3. Depress the "Selective" FREQUENCY RESPONSE push-button, then
select the appropriate weighting network (A, B, C, D or Lin.) as
required by switching the frequency scale pointer.
4. With the OUTPUT SECTION ATTENUATOR in the "x1" position
adjust the INPUT SECTION ATTENUATOR until a suitable meter
deflection is obtained without any indicated overload. If the deflec-
tion is insufficient, even when the INPUT SECTION ATTENUATOR
is in its "10 mV" range, then adjust the OUTPUT SECTION ATTEN-
UATOR.
If the INPUT OVER LOAD light flashes, turn the INPUT SECTION
ATTENUATOR to a higher range.
If the OUTPUT OVERLOAD light flashes, turn the OUTPUT SEC-
TION ATTENUATOR to a higher range.
5. The measured Sound Level or Sound Pressure Level is the sum of the
meter reading and the attenuator setting displayed by the range
setting indicators.
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.
4.3. VIBRATION MEASUREMENTS
1. Calibrate the 2010 and the accelerometer as described in sec-
tion 3.2.3.
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