This device utilizes constant voltage measurement method and constant current measurement method to automatically measure the minimum resonant frequency (Fo), nominal impedance (Ze), and Qo.
A new algorithm is applied in order to find the resonant frequency for sweeping a large bandwidth with quick and precise measurement.
The result of the measurement can be collected from the PC, and the program can control the measuring instrument in real time.
In the PC control program, the T/S option can be added to measure Thiels-Small parameter.
Special Feature:
1. Quick automatic measurement is available due to the new algorithm for the measurement of the speaker’s Fo.
2. You can select the measurement methods, constant voltage measurement method and constant current measurement method.
3. You can set the passing ranges of Fo and Ze for pass/fail management.
4. The statistics processing function calculates and gives the maximum value, minimum value, mean value, and the standard deviation of the measured values.
5. The set data of at most 100 models can be saved to be selected.
6. Either linear or log values of the sweep method can be set for precise or wide range of bandwidth measurement, according to the conditions.
7. In case of constant voltage measurement (1V standard), the speaker impedance can be measured between 1Ω~20KΩ, making the measurement of low impedance speaker to high impedance piezoelectric speaker.
8. The measured data can be stored up to 2,000 units, and it is collected by the control program, to be saved or printed.
9. The PC control program has configuration and measurement functions, and when option 2 is used, Thiel-Small parameter can be measured.
Constitute:
1. A/D Converter : 24bit 2channer.
2. DISPLAY : 480 X 272 4.2” TFT-LCD
3. Interface Bus : USB 2.0
4. Remote control interfaces : 9P D-Type Connector. I/O Signal-Start, Pass, Fail
5. Main Power requirements : AC 220V 50/60Hz 50VA / OPTION : 110V
6. DIMENSION : 250 (W) * 150 (H) * 320 (D) mm
7. weight : 4kg
1/ 96 Oct ± 5% + 1Dig
1/192 Oct ± 2% + 1Dig
1/384 Oct ± 1% + 1Dig
Linear ± 1% + 1Dig
FREQUENCY ACCURACY
10Hz ~ 20KHz ± 0.2%
100Hz ~ 20KHz ± 0.03%
10Hz ~ 20KHz ± 0.2%
100Hz ~ 20KHz ± 0.03%
BAND WIDTH
THD
10.0 Hz - 20.00 KHz
* THD (1V Rms) < 0.2%
10.0 Hz - 20.00 KHz
* THD (1V Rms) < 0.2%
MAX OUTPUT VOLT
10V (Rms)
10V (Rms)
MAX OUTPUT CURRENT
1000 mA
1000 mA
STATISTIC QUANTITY
2000 EA
2000 EA
PASS IN WIDTH
FREQUENCY WIDTH OF SELECT RANGE
Impedance WIDTH OF SELECT RANGE
MEASUREMENTS
SPEED
Narrow – 4Sec (Average)
1 Sec
Broad
Sweep
(Max Time)
10Hz~20KHz
SWEEP
[1]
1/12
[2]
1/24
[3]
1/48
[4]
1/96
6sec
12sec
23sec
46sec
[5]
1/192
[6]
1/384
[7]
Linear
92sec
184sec
237sec
Option 01 - Data Acquisition software
The Acquisition Software allows the user to upload and download stored data in the SG-2882 to and from a computer and take control of its operation. It also enables the computer to save, analyze, and print the data.
- All functions of SG-2882 can be controlled with the PC.
- up to 100 measurement conditions can be set for up/down load using SG-2282.
- The measurement results can be saved as html or text, or be printed.
Option 02 - Thiels Small Parameters
Selection of Option 001 + Option002 enables SG-2882 to compute T/S parameters on a computer connected to it as well as an ‘Add Mass’ value in the event a speaker’s mass has changed and an ‘Add Volume’ value in the event a test box’s area has changed.
- The T/S parameter can be obtained from the value measured through SG-2882.
- Measurement category : Fs, F1, F2, Zmax, Zts, r∮, Symmetry, Qms, Qes, Qtc, EBP, BL, Vas, Mms, Cms, Rms, Mas, Cas, Ras, no, Fs’, F1’, F2’, Zmax’, Zts’, Sysm’. [ Add Mass, Add Volume]
[Symbol definitions and units]
ro = Max. Voice-coil impedance to DC-resistance ratio
Symmetry = Symmetry of resonance peak
Qms = Mechanical Q in free air
Qes = Electrical Q in free air
Qts = Total Q in free air
LVC(1KHz) = Voice coil inductance at 1KHz
EBP = Efficient bandwidth product
BL = driver transduction constant in Tesla-meters
Vas = Compliance equivalent air volume
Mms = Mechanical mass of diaphragm assembly, including air
Cms = Mechanical Compliance of driver suspension
Rms = Mechanical resistance of driver suspension losses
Mas = Acoustical mass of diaphragm assembly, including air
Cas = Acoustical compliance of driver suspension
Ras = Acoustioal resistance of driver suspension losses
no = Acoustical reference efficiency
Fs = Resonance frequency
Zmax = Impedance at resonance frequency
Zts = Sometimes Called the Thiels Small impedance