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.

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.

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

		Fo	Ze
OUTPUT VOLT		0.1 - 5V (Rms) ± 1% + 1Dig	0.1 - 5V (Rms) ± 1% + 1Dig
OUTPUT CURRENT		20 ~ 1000mA 2mA ~ 100mA 0.2mA ~ 10mA ( ± 1% + 1Dig)	20 ~ 1000mA 2mA ~ 100mA 0.2mA ~ 10mA (± 1% + 1Dig)
MEASUREMENTS IMPEDANCE		1 ~ 100 50 ~ 1K 500 ~ 10K (± 1% + 1Dig)	1 ~ 100 50 ~ 1K 500 ~ 10K (± 1% + 1Dig)
MEASUREMENT ACCURACY	Narrow	1/12 Oct 1/24 1/48 1/96 1/192 1/384 Linear (± 1% + 1Dig)	± 1% + 1Dig (>0.1mA) * CONSTANT CURRENT 20 ~ 80mA = 1 ~ 100 2 ~ 8mA = 50 ~ 1K 0.2 ~ 0.4mA = 500 ~ 10K
	Broad	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

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.

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]