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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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Products include instrument bags (e.g. guitar, electronic keyboard bag, ukulele), school bag, trolley outdoor bags, telescoping insulated bags, carry on bags, telescoping suitcases, utility bags, computer bags and backpacks, soft bags, swim backpacks, athletic bags, first aid bags, firefighter utility bags, suitcases and athletic bags with telescoping handles, other telescoping bags .Manufacturing
Characteristics of Sitka Spruce Origin of Wood Type Europe USA & Canada Botanical Name Picea sitchensis Specific Gravity 0.43 Avg. Weight Per BF 2.25 lb/ bf Color Range Cream â?? White with a Pink Tint Rarity / Availability Not Readily Available Typical Avg. Width 2â?³ to 10â?³ Typical Avg. Length 2â?² to 12â?² Avg. Waste Factor 0.3 Wood Uses Aircraft Veneer, Oars, Boat Building, Soundboards, Musical Instruments, Building Construction and many other uses Lumber Grades Quartersawn (Musical Instrument Grade), Guitar Sets Other Trade Names Silver Spruce, Tideland Spruce, Menzies Spruce, Coast Spruce
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
Smacna, DW 142-143, DIN 24-194 and TSE standards, production in all sizes and thicknesses from 0.50 mm to 1.20 mm, Internal and external Rubber-Acoustic insulation construction, Galvanized and Manufactured from stainless steel, manufactured in harmony with each other, minimum sealing in flanges and corners, full sealing with mastic after production is provided.
Al-CCL standard size is 1000*1200mm(40*48 inch),thickness from 0.4mm to 4mm.Thermal conductivity include 0.5,1,1.5,2.0W.And all our products have been compiled series with all complete specifications. Aluminium copper clad laminats 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. Copper Thickness:18um,25um,35um,70um Board Thickness: 0.4mm, 0.8mm,1mm,1.2mm,1.5mm,1.6mm 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 Thickness 0.8mm,1mm,1.2mm,1.6mm,2.4mm Copper Thickness 18um,25um,35um,70um Color white /yellow
CEM-1 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 Thickness 0.8mm,1mm,1.2mm,1.6mm,2.4mm Copper Thickness 18um,25um,35um,70um Color white /yellow
FR-1 copper clad laminated sheet/CCL consist of bleached wood pulp paper, impregnated with flame retardant phenolic-epoxy resin and clad with electrolytic copper foil.It has high electrical stability, good flame retardancy, good dimension stability and smoothness, good punching ability and widely used for Hi-Fi acoustic devices, color TV sets and other electronic appliances. Copper Thickness:18um,25um,35um,70um Board Thickness: 0.8mm,1mm,1.2mm,1.5mm,1.6mm Size:40*48inch Color: Brown Brand:Chifeng
The sliding door and pence system provides high insulation as well as an impressive and elegant appearance with its slim and very light profile. In addition, the system meets high quality standards while not exceeding the industry's price level. This gives architects the freedom to achieve significantly higher temperature, wind, sound/acoustic, waterproofing and insulation values at price levels previously unattainable. Thanks to its advanced technology, Talya creates open spaces and glazed surfaces, providing much greater transparency and allowing light to penetrate into the building. It also offers a high level of thermal performance in addition to its elegantly slim 34 mm profile.
Characteristics of Black Walnut Origin of Wood Type North America, most of our stock comes from the North East USA Botanical Name Juglans nigra Specific Gravity 0.64 Avg. Weight Per BF 3.5 Color Range Dark Brown Rarity / Availability Readily Available in normal widths, figured and wide slabs can be very rare! Typical Avg. Width 4â?³ to 24â?³, can be found up to 36â?³ wide fairly easily, and rarely found up to 67â?³ wide Typical Avg. Length 8â?² to 16â?² Avg. Waste Factor 0.5 Wood Uses Fine Furniture, Cabinetry, Architectural Millwork, Guitar Building / Instrument Making, Wood Turning, Boat Building, Wood Carving, Veneer, Flooring and many other uses Lumber Grades Common 1 & 2, Select and Better, FAS, Quartersawn, Quartersawn (Figured), Flitch, Figured (Heavy), Figured (Medium), Veneer, Premium / Clear Other Trade Names American Walnut, Eastern Walnut, Pennsylvania Walnut, Virginia Walnut
Detection Principle Raycom systems use typical single-mode fiber optic cables as powerful vibration sensors.RBtec uses different technologies for different applications, such as Distributed Acoustic Sensing (DAS) technology and Distributed Vibration Sensing (DVS) technology, as a method of monitoring fiber optic measurements. Fiber optic cables become extremely sensitive to pressure, acoustics, and motion, and are able to detect small vibrations transmitted through fences, soil, or surfaces.Raycom systems can monitor vibration signals along the length of a fiber optic cable, locate intrusion events, and classify specific features based on detection algorithms. Key features and benefits of a fiber optic fence system for a school Intrusion Detection: Fiber optic fence systems use strands of optical fibers embedded in the fence structure. These fibers can detect vibrations and disturbances caused by someone attempting to climb, cut, or breach the fence. Immediate Alerts: When an intrusion is detected, the fiber optic system can instantly send alerts to a central monitoring station or security personnel. This rapid response allows for immediate action to be taken. High Sensitivity: Fiber optic sensors are highly sensitive and can detect even minor disturbances, minimizing false alarms while ensuring accurate detection of potential threats. Zoning Capabilities: The system can be divided into zones, allowing security personnel to pinpoint the exact location of an intrusion. This makes it easier to respond effectively. Integration: Fiber optic fence systems can be integrated with other security systems, such as CCTV cameras, access control systems, and alarm systems, creating a comprehensive security network. Remote Monitoring: Security personnel can monitor the fence system remotely through a computer or mobile device, providing 24/7 surveillance and quick response capabilities. Low Maintenance: Fiber optic fences are generally low-maintenance, requiring minimal upkeep compared to traditional security measures like barbed wire or electrified fences. Tamper Resistance: Since the optical fibers are hidden within the fence structure, it's difficult for intruders to tamper with or disable the system.
