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.
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
Metal tin is mainly used in the manufacture of alloys. Tin and sulfur compounds - tin sulfide, which is similar in color to gold, is commonly used as a gold pigment. Tin's modern application is as a solder for the electronics industry. Used in various purities and alloys (often with lead or indium), tin solders have a low melting point, which makes them suitable for bonding materials. Standard ASTM B29-03, BS EN 12659:1999, GB/T 469 -2005 , Content Pb â?¥ 99.99 % Density 11.34 g / cm 2 Color Bluish Weight 35 kgs / lump, 55 kgs / lump Dimension 21" x 4" x 2.5" Package Standard Sea-worthy package, fixed by belt per ton Shape Rectangular Lump Application lead-acid storage batteries Ammunition, cable sheathing, and building construction materials counterweights, battery clamps cast products such as: bearings, ballast, gaskets, type metal, terne plate, and foil Container Size 20Gp - 2.352(width) *2.385 ( Height ) * 5.90 ( Inside length ) Meter 40Gp - 2.352(width) *2.385 ( Height ) * 11.8 ( Inside length ) Meter 40HQ - 2.352(width) *2.69 ( Width ) * 5.90 ( Inside length ) Meter
Supplier: Leather travel bags, toiletry bag, satchels bags, briefcase, office bag, professional briefcase bags, messenger bag, cross body bags, ladies purse, shopping bags, tool roll up pouch, matka bags, wallets, money clipper, ladies wrist wallet, money/coin pouch, portfolios, pencil case, knife roll, apron, backpack, photo album, journal, leather mirrors, leather furniture, leather tray & boxes, leather baskets, boxes, watch case and leather bar items, leather jackets, leather skirts, leather pants. domestic home appliances, mixer grinder, juicer mixer grinder, food processor, iron, dry iron, steam iron, induction cooker, gas cooktop
Clamp Meter
3 meter- 6m 10m12m Vehicle Mounted Camera Tower Pneumatic Telescopic Mast Pneumatic Lifting,camera Mast Pole 0.20 Mpa TAL-P3-1.3-30 Ce
