Table of Contents
Advertisement
2.
Set the controls as follows:
GAIN CONTROL
INPUT SECTION ATTENUATOR
OUTPUT SECTION ATTENUATOR
EFFECTIVE AVERAGING TIME
READ OUT SELECTOR
FREQUENCY RESPONSE
INPUT push button
"Cal."
"300 V"
"x
1 "
"Fast" or as appropriate for analysis
As appropriate to meter scale used and output re-
quired
"Linear"
As appropriate
3.
Feed the unknown voltage to the input used and adjust the INPUT SECTION ATTENU-
ATOR until a suitable meter deflection is obtained. If the deflection is insufficient,
even when the INPUT SECTION ATTENUATOR is in its "1 0 mV" position, then ad-
just the OUTPUT SECTION ATTENUATOR.
3.3.2. Input Voltages up to 700 V Peak
Use can be made of the GAIN CONTROL to accommodate input voltages of up to 700 V
peak (approx. 500 V sine). However, the 201 0 must be calibrated to give exactly 1 0 dB
attenuation. Procedure is as follows:
1.
Repeat the calibration procedure, as described in section 3.2.1.
2.
With the meter scale pointer set on the red mark (50 mV), set the INPUT SECTION
ATTENUATOR to 30 mV causing the needle to deflect off scale.
3.
Adjust the GAIN CONTROL to bring the needle back to the red mark. The 2010 is
then calibrated so that 1 0 dB must be added to the value of all meter indications.
3.4. SOUND MEASUREMENTS
32
1.
Calibrate the 2010 and the microphone as described in section 3.2.2.
2.
Hold the microphone steadily and at least 1 metre 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 ap-
propriate weighting networks (A, B, C, D or Lin.) as required by switching the fre-
quency scale pointer.
4.
With the OUTPUT SECTION ATTENUATOR in the
"x
1" position, adjust the INPUT
SECTION ATTENUATOR until a suitable meter deflection is obtained without any indi-
cated overload. If the deflection is insufficient, even when the INPUT SECTION AT-
TENUATOR is in its
"1
0 mV" range, then adjust the OUTPUT SECTION ATTENUA-
TOR.
If the INPUT OVERLOAD light flashes, turn the INPUT SECTION ATTENUATOR to a
higher range.
If the OUTPUT OVERLOAD light flashes, turn the OUTPUT SECTION 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.
Advertisement
Table of Contents
