Ono Sokki DS 0297 User manual

DS-2000 Series
Sound Level Measurement
ONO SOKKI CO., LTD.

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Sound Level Measurement
Target: Measurement of sound level generated from a drive unit having a gear under a steady
operating condition and a condition where the number of rotations is dynamically changed.
Purpose: Measurement of sound level
How much is level variation?
What should be done as noise reduction measures?
Equipment:
Equipment Name
Model Name
Qty.
Remarks
Main unit DS-2104 1
AC power adapter for main unit
1
With AC cable
Notebook PC 1
AC power adapter for notebook PC
1
With AC cable
I/F card/cable DS-0297 1
Soft protection key
1
Microphone MI-1233 1
Preamplifier for microphone
MI-3110
1
Sound pressure calibrator SC-3120 1
Rotation sensor
HT-5200
1
Tripod 2 For microphone/rotation sensor
Table tap
1
3 outlets or more
Both-ends BNC cable 1 Between DS-2104 and MI-3110
BNC mini-mini type jack cable
1
Between DS-2104 and HT-5200
Measurement procedure:
1. Device connection
2. Device activation/check
3. Sensor calibration
4. Measurement, analysis, data storage
5. End

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1. Connecting Devices
1-1. Connection Diagram
1-2. Connection Procedure
(1) Connect the power adapter to the personal computer.
(2) Connect the power adapter to the DS-2000.
(3) Insert the protection key into the personal computer.
(4) Connect the interface (ONOLINK II (Card)) between the personal computer and the DS-2000.
(5) Connect the both-ends BNC cable between the measurement microphone and the DS-2000 Ch1 input.
(6) Connect the signal cable between HT-5200 and EXT Sample of the DS-2000.

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2.Activating and Checking Devices
2-1. Turning the Power On
(1) Set the power switch on the front panel of theDS-2000 to the upper position.
The green lamp of the switch lights up.
(2) Turn on the power of the personal computer.
The Windows OS starts.
(3) Turn on the power of the HT-5200.
The LCD turns on.
2-2. Activating DS-2000
(1) Double-click the DS-0221FFT icon on the desktop.
(2) Maximize the window size (both inner and outer windows).
2-3. Checking DS-2000 and Setting Conditions
(1) Setting to initial conditions
Select New Project from the File menu.
Click OK to set FFT analysis
initial conditions.
(2) Setting a frequency range
Use the Freq tool bar.
Select an upper limit of analysis
frequency from this drop-down list.

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(3) Setting an input source
Select Voltage Range from the Input menu.
Set SENSOR(2.0mA) as a signal from
MI-3110 (BNC in the case of voltage input).
(4) Set an input voltage range.
Select Voltage Range from the Input menu.
(5) Start data sampling.
Click the ">" tool button.
Select a minimum value with which the
OVER LED does not light up, from this
drop-down list.

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(6) Change the display gain.
Use the tool bar.
Click these buttons (△ and ▽).
When checked, all the displayed
scales will be changed.
Clicking △ decreases this value
(magnifies small data).
Clicking ▽ increases this value
(small data is not displayed).
Make sure that the signal from the sensor (microphone) can be correctly analyzed.

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3. Calibrating the Sensor (Microphone)
1. Insert the tip of the microphone into the calibrator.
2. Turn on the calibrator.
3. If the input over LED is list, increase the voltage range.
4. Perform calibration.
(1) Select Unit / Calibration from the Input menu.
First, click
here.
Then, click here.
Enter a space.
To use more than
one sensor, make
setting for each
channel.
Select the Overall
position using this
scroll bar.
Set a calibrator value
(sound pressure
level) here.
Make sure that the setting
is displayed when the
SET button is pressed.

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4. Measurement andAnalysis
4-1. Frequency Analysis of Sound Level
(1) Select the dual-screen mode and display the time-axis waveform at the top and the power spectrum at the
bottom.
Select Display Layout from the right-click menu and then select Dual in the Display Conditions dialog.
Select Dual
(up to Octuple (x8)).
When the top screen is active,
select Time from this drop-down
menu.
Since Power Spectrum has
already been selected, Set
the channel No.
(2) Select a frequency range from 10 kHz to 20 kHz.

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(3) Select a voltage range that does not cause input-over.
(4) Perform data sampling.
Monitor in the instantaneous mode.
Create analysis data in the averaging mode.
(5) Viewing data
Time waveform
Random
waveform is
contained.
The same pattern is
repeated.
Power spectrum
Repetition time (period)
can be grasped.
Frequency
component
equivalent
to repetition
period
Frequency components around here correspond to
instantaneous extemporary components.

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4-2. Saving Data
(1) Saving the displayed screen data in a file
Select Save Data (Show) from the File menu.
Enter file name (group
name) for saving data.
For the dual screen mode, two files will be created. Generates a file name
consisting of group
name and number.

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(2) Saving data of specified type in a file
Select Save Data (Select) from the File menu.
(3) Saving text in a text file

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(4) Saving as an image file
Select Copy Setup from the Edit menu, select Bitmap, and execute Copy.
Example of data
pasted to "Paint"
(5) Pasting data to Office application software.
Select Copy Setup from the Edit menu, select Text, and execute Copy.
Example of data pasted
to "Excel"

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4-3. Comparing Sound Level
(1) Select the dual-screen mode.
Select Display Layout from the right-click menu and then select Dual in the Display Conditions dialog.
(2) Load file data to be used as reference data in the top screen.
Click the top screen to activate it. Then, select Open Data from the File menu.
(3) Load file data to be compared with the reference data in the top screen.
Click the top screen to activate it. Then, select Open Data from the File menu.
(4) Select Manual as the Y-axis scale.
Select Y-axis Set from the right-click menu.

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(5) Select the Dual and Overlay display modes.
Select Display Layout from the right-click menu and then check Overlay in the Display Conditions dialog.
Blue dotted line: Comparison data
Red solid line: Reference data
(6) Use the cursor function.
When you click in the screen, the frequency and sound level value can be read directly.
4-4. Measuring Sound Level Variation
(1) Select Tracking(OnLine) from the Mode menu.

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(2) Set the following tracking conditions.
Range of number of rotations subjected to tracking
Rotational pulse condition
Number of blocks to be sampled
Maximum analysis order
(3) Starting tracking analysis
With the TRACK tool button pressed, click START.
(4) Tracking display

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(5) Viewing data of tracking results
Overall is used to
determine overall
sound level variation.
Tracking display of specified order
(up to 4th order)
Data of specified order is used to search
for individual sound factor.
Order spectrum at any desired rpm
3D tracking
display
Horizontal axis
assigned order
Components in
parallel with slanted
axis appear at a
constant order.
Slanted axis
assigned rpm

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5. Ending process
5-1. Turning the Power Off
When analysis software is activated, do not turn off the power of DS-2000.
(1) Normally terminate Windows OS of the personal computer.
(2) Turn off the power of DS-2000 (DS-2104).
5-2. Disconnection
(1) Disconnect the signal cable between the HT-5200 and EXT Sample of DS-2000.
(2) Disconnect the both-ends BNC cable between the measurement microphone and Ch1 input of DS-2000.
(3) Disconnect the interface (ONOLINK II (Card)) between the personal computer and DS-2000.
(4) Remove the protection key from the personal computer.
(5) Disconnect the power adapter of DS-2000.
(6) Disconnect the power adapter of the personal computer.
CAUTION:
1. The copyright of this procedure manual is reserved by Ono Sokki Co., Ltd.
2. Duplication without prior permission is prohibited.
3. This procedure manual explains general measurement procedures. Ono Sokki assumes no responsibility for data
obtained through a specific operation performed by the customer.