Sigma eltec::Best in the WORLD

Introduction:
本仪器是利用恒压(Constant Voltage)测定法和恒流(Constant current)测定法，自动测定音箱的最低谐振频率（Fo）、标称阻抗（Ze）及Qo。为测定谐振频率，采用新的算法，在扫出广泛频宽时，能够快速、正确测定。在PC可搜集及输出测定结果，在PC的控制用程序中，实时性控制测定仪。在PC的控制用程序中，添加T/S Option，可测定Thiels Small Parameter。

Special Feature:
1. 为测定音箱的Fo，采用新的算法，在短时间内，可自动测定。
2. 可选择恒压测定法和恒流测定法进行测定。
3. 设定Fo和Ze的合格范围，可管理Pass/Fail。
4. 以计算已测定数据的最大值、最小值、平均值、标准偏差值，来输出统计处理。
5. 可保存及选择最多100个模型的设定数据
6. 可选择Linear或Log的扫描方式，根据测定条件选择精密测定或大范围频率测定。
7. 测定恒压时（1V为准），可测定1Ω~20KΩ的音箱阻抗，可测定低阻抗至高阻抗的压电音箱。
8. 可记录2000个测定数据，在PC的控制用程序中可保存及输出。
9. 用PC的控制程序，可设定及测定。使用选项2，可测定Thiels Small Parameters。

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

Specification:

OUTPUT VOLT

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%

BAND WIDTH
THD

10.0 Hz - 20.00 KHz
* THD (1V Rms) < 0.2%

MAX OUTPUT VOLT

10V (Rms)

MAX OUTPUT CURRENT

1000 mA

STATISTIC QUANTITY

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

Option 02 - Thiels Small Parameters

[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

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