Solar panel 400W Panel size: 1722*1134*35mm Packing: 31pcs/pallet 806pcs/40'HQ Weight: 22.0kg Voc(V) 37.0V Isc(A) 13.60A Vm(V) 31.0V Im(A) 12.91A Efficiency 20.5%
Solar panel 450W Panel size: 1909*1134*35mm Cell: Monocrystalline PERC 182*182mm Packing: 31pcs/pallet, 744pcs/40'HQ Voc(V) 41.3 Isc(A) 13.89 Vm(V) 34.7 Im(A) 12.98 Efficiency 20.8%
Solar panel 500W Panel size 2094*1134*35mm Packing: 31pcs/pallet 682pcs/40'HQ Voc( V) 45.7V Isc(A) 13.92A Vm(V) 38.3V Im(A) 13.05A Efficiency 21.1% Weight: 25.1kg Cell: Monocrystalline PERC 182*182mm
Solar panel 550W Panal size: 2278*1134*35mm packing: 31pcs/pallet. 620pc/40HQ Voc/V 49.8V Isc/A 13.99A Vmp/V 41.95V Imp/A 13.12A
Solar panel 550W Panal size: 2278*1134*35mm packing: 31pcs/pallet. 620pc/40HQ Voc/V 49.8V Isc/A 13.99A Vmp/V 41.95V Imp/A 13.12A
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testing speakers, headphones, bluetooth, microphones and other acoustic instruments, sunlight audio sweeper, loudspeaker polarity tester, noise generator, gauss meter, impedance meter, digital high speed fo meter .
SUNLIGHT AUDIO SWEEPER 7116C Loudspeaker Polarity Tester 139B NOISE GENERATOR 8121C GAUSS METER 138 IMPEDANCE METER 152A DIGITAL HIGH-SPEED Fo METER 7117 C.
Model 7117C has the following two main functions: A.Model-7117C can measure the Fo value of a loudspeaker fully automatically, with no need for manual adjustment of the instrument. The correct Fo value of a loudspeaker is displayed on the DISPLAY PANELã??( 14 ) in just 1 to 1.5 seconds. It has many advantages to using a voltmeter with a needle indicator for measuring the Fo value of a loudspeaker: ( a ) Easy to read; ( b ) No visual error; ( c ) High accuracy. B. Model-7117C can be used in a production line: high speed judging if the Fo value of every loudspeaker is within the qualified range, Judging speed is as fast as in just 0.3 to 0.7 seconds, the â?? PASS / FAIL Testâ?? functions will be indicated instantly. Technical specificationï¼? A. Display: Displayed in 3 �¾digits. B. Accuracy: Fo readout error less than �± ( 1% + 1Hz ) C. Measuring Range: 4 ranges from 16Hz to 3KHz, ( a ) 16Hz - 80Hz ; ( b ) 54Hz - 270Hz. ( c ) 180Hz - 900Hz ; ( d ) 600Hz - 3KHz. D. Fo measuring voltage added on the pre-measure loudspeaker: 1V r.m.s. �± 10%( complies with EIA standard ). E. Can test the impedance of an under-testing loudspeaker: Divided into two ranges, which are (1) 3�© to 18�©; (2) 19�©to 100�©. F. Measuring Speed: ã?? Fo Readout ã??in 1 to 1.5 seconds. ã??PASS / FAIL Testã??in 0.3 to 0.7 seconds. G. Limit Setting: Both the upper & lower limits of a loudspeaker can be preset independently from 16Hz to 3KHz, and have no interference with each other. H. Limitation in usage: Model-7117C can not be used to measure the Fo value of an air suspension loudspeaker, including those loudspeakers which are air-tight frames, since their Q.o. values are too low to measure. SUNLIGHT AUDIO SWEEPER 7116C Loudspeaker Polarity Tester 139B NOISE GENERATOR 8121C GAUSS METER 138 IMPEDANCE METER 152A DIGITAL HIGH-SPEED Fo METER 7117 C.
the weighting filter 8121FT-1 (IEC-268-1) 1 8121FT-1 is the weighting filter made by IEC-268-1 requirement, it must linked with either Model-8121C, to enable it to generate a weighting noise filter that complies with IEC-268-1 requirements, for undergoing the life testing of the loudspeaker and defining the rated power of the loudspeaker 2 When using please take note that: The input signal adopts the Pink Noise, and not other signal of noise sources. 3 Furthermore, the noise generated from this weighting filter also complies with the filter noise required by the JIS C5532. SUNLIGHT AUDIO SWEEPER 7116C Loudspeaker Polarity Tester 139B NOISE GENERATOR 8121C GAUSS METER 138 IMPEDANCE METER 152A DIGITAL HIGH-SPEED Fo METER 7117 C.
Model-8121C uses a logic circuit to generate Pseudo Random Noise, it is the newest and the most advanced design to generate audio white noise. It has a much flatter frequency response than using a diode. Model-8121C has: (1)White noise source. (2)Weighting filters. (3)Built-in power amplifier. (4) TRUE RMS voltage meter circuit. It can generate five different kinds of the noise spectrum, including White Noise, Pink Noise, and three kinds of Weighted Noise, that conform to the following nations standards:(1) JIS C5531, IEEE 219, CNS 4785 (2) EIA 426B(3) DIN 45573 1. White Noise: -3dB Bandwidth: 20Hzï½?100kHz, Roll off:-24dB / Oct. Flatness: �±1dB 2. Pink Noise: -3dB Bandwidth: 20Hzï½?20 kHz Roll-off: -24dB / Oct. Crest factor: 4 ( IEEE 219 ) Amplifier: 1.100W output is defined at an unclipped maximum output of sine wave. 2.Frequency response : 20 Hz~20 kHz ±0.2dB; 20 kHz~100kHz ±1dB 3. Output: With permanent short circuit protection. Load Impedance:
Even in a very noisy environment, Model-139B still has the ability to determine quickly and precisely the positive and negative polarity of a loudspeaker headphone receiver and every single unit in a loudspeaker system. Model-139B also includes 3 sets of external input terminal and selector which can be used to combine with other instruments, in order to measure the other features of a loudspeaker simultaneously. It is quite suitable for 100% Q.C. testing for loudspeakers in the production line. Loudspeaker Polarity Tester 139B Technical specification: (1) Pulse measuring method. (2) Polarity indicator : (a) Green indicator: Positive polarity with beep sound. (b) Red indicator: Negative polarity with no sound at all. (3) Five touch switches : (a) WF range: Suitable for measuring the polarity of the woofer. (b) M & T range: Suitable for measuring the polarity of midrange and tweeter. (c) EXT.1 to EXT.3: Used to select the instrument connected to the external input terminal. (4) Model-139B can be connected with Model-7116C, to measure the buzz, and rattle of a loudspeaker. Only one operator is needed. (5) Measuring distance: 2 to 4 Cm. from the center point. of the dust cover of the pre-measure loudspeaker. (6) Measuring sensor: Uses ECM. (7) Dimension ( m / m ): 85 ( height ) x 205 ( width ) x 280 ( depth ). (8) Weight: 2.3 Kg. SUNLIGHT AUDIO SWEEPER 7116C Loudspeaker Polarity Tester 139B NOISE GENERATOR 8121C GAUSS METER 138 IMPEDANCE METER 152A DIGITAL HIGH-SPEED Fo METER 7117 C.
Model-8121C uses a logic circuit to generate Pseudo Random Noise , it is the newest and the most advanced design to generate audio white noise. It has a much flatter frequency response than using a diode. Model-8121C has: (1)White noise source.(2)Weighting filters. (3)Built-in power amplifier. (4)�¢?? TRUE RMS �¢?? voltage meter circuit. It can generate five different kinds of noise spectrum, including White Noise, Pink Noise, and three kinds of �¢??Weighted Noise�¢??, that conforms to the following nation�¢??s standards:(1) JIS C5531, IEEE 219, CNS 4785 (2) EIA 426B(3) DIN 45573 1. White Noise: -3dB Bandwidth: 20Hz 100kHz, Roll off:-24dB / Oct. Flatness: �?�±1dB 2. Pink Noise: -3dB Bandwidth: 20Hz�¯�½?20 kHz Roll-off: -24dB / Oct. Crest factor: 4 ( IEEE 219 ) Amplifier: 1.100W output is defined at an unclipped maximum output of sine wave. 2.Frequency response : 20 Hz~20 kHz �±0.2dB; 20 kHz~100kHz �±1dB 3. Output: With permanent short circuit protection. Load Impedance: 3.2
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Hailing & Directional Speaker System The hailing & directional sound system offered by DSPPA is a cutting-edge solution designed to provide clear and intelligible audio in outdoor environments. This innovative system is ideal for effective communication and crowd control. With advanced features and superior sound projection, it enhances any public address system. Visit the website to explore the range of products and elevate your audio experience. Where can a long range acoustic devices system be used? The long range acoustic devices system has strong sound propagation directivity and has little impact on the surrounding irrelevant areas. It has been used as a non-lethal dispersal weapon by military and police in many countries, including China and the United States. Similar devices are equipped on Chinese and US warships patrolling the Gulf of Aden, and they have played a huge role in anti-piracy operations. The mass notification speaker system can also be used for long-distance warning at highway entrances and exits, and for driving away insects and birds in forests. How does a long range acoustic devices system(LRAD) work? The long range acoustic devices system is designed with three bypass speakers on the front. The sound is compressed and concentrated by the sound wall, so that the sound waves can propagate forward along the device without radiating to the sides, thus reaching farther.
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XPC Copper clad laminated sheet/CCL consist of bleached wood pulp paper, impregnated with modified phenolic resin and clad with electrolytic copper foil.It has high dimension stability, good punching behavior at low temperature, high thermal resistance and are widely used for computers, telephones, Hi-Fi acoustic devices, electronic toys and etc. Material: paper based Size: 40*48inch Board Thickness: 0.8mm,1mm,1.2mm,1.5mm,1.6mm Copper Thickness: 18um,25um,35um,70um Color: brown
XPC Copper clad laminated sheet/CCL consist of bleached wood pulp paper, impregnated with modified phenolic resin and clad with electrolytic copper foil.It has high dimension stability, good punching behavior at low temperature, high thermal resistance and are widely used for computers, telephones, Hi-Fi acoustic devices, electronic toys and etc. Material: paper based Size: 40*48inch Board Thickness: 0.8mm,1mm,1.2mm,1.5mm,1.6mm Copper Thickness: 18um,25um,35um,70um Color: brown
Aluminium copper clad laminates is widely used for the modifier and sparker on fire for motorcycle and mobile, power LED, sound box, power supply module and acoustics shielding system etc. Al-CCL standard size is 1000*1200mm(40*48 inch),thickness from 0.4mm to 4mm. And all our products have been compiled series with all complete specifications. Copper Thickness:18um,25um,35um,70um Board Thickness: 0.4mm, 0.8mm,1mm,1.2mm,1.5mm,1.6mm Thermal conductivity: 0.5,1,1.5,2.0W. Size: 1000*1200mm Film: Blue/Green or without any film Brand:Chifeng Material: Aluminium Core+copper Application: LED lamp Side: Single side
CEM-3 copper clad laminate consists of bleached fiber glass cloth, impregnated with flame retardant epoxy resin and clad with single glass fabric and electrolytic copper foil. It has high electrical and electrical strength, good flame retardancy, good dimension stability, lower bow and twist: it is widely used for computers, VCD sets, Hi-Fi acoustic devices and other high grade electronic appliances. Size: 40*48inch Board Thickness: 0.8mm,1mm,1.2mm,1.5mm,1.6mm Copper Thickness: 18um,25um,35um,70um Color:white /yellow
