SPECIFICATION FOR APPROVAL Customer： Description： Magnetic Transducer Sob erton Part No. ： WT-1205 Date：2008-10-13 Customer Model No. ： Date of Approval Authorization Signature 211 N. First Street Minneapolis, MN. 55401 612-849-6205 Http://www.sob erton.com E-mail： info@sob erton.com Approved Checked Design Ryan Wang Wei Rong Xu Hong Wei 2008/10/01 2008/10/01 2008/10/01 A:SCOPE This specification applies magnetic transducer, WT-1205 2/7 B:SPECIFICATION ■ Test condition: TEMP=+25±2 ℃ Related humidity=65±5% Air pressure:860-1060mbar NO. Item Unit Specification Condition Rated Voltage Vo-p 1 Vo-p 5.0 2 3 4 5 6 7 8 9 10 11 12 13 14 Operating Voltage Mean Current Coil Resistance Sound Output Rated Frequency Operating Temp Storage Temp Dimension Weight Vo-p mA Max. 40 Ω 47 ± 15% dBA 87 at 10cm Hz 2400 ℃ -20 ~ +70 ℃ -30 ~ +80 mm Φ 12.0 × H 9.8 gram 2.0 Material 0V Applying rated voltage & rated frequency, square wave 1/2 duty Distance at 10cm(A-weight free air), Applying rated voltage & rated frequency, square wave,1/2duty See attached drawing. PBT (Black) Terminal Pin type Environmental Protection Regulation Storage life 4.0 - 6.0 See attached drawing RoHS Compliant month 3 3 months preservation at room temp(25±3℃), Humidity40% 3/7 C:ENVIRONMENT TEST No. 1 2 Item Test condition Evaluation standard High temp. test After being placed in a chamber at +70℃ for 96 hours. Low temp. test After being placed in a chamber at -30℃ for 96 hours. The part shall be subjected to 10 cycles. One cycle shall consist of; +70℃ 3 Thermal shock -30℃ 30min 30min 60min The part shall be subjected to 10 cycle and consist of; 4 +70℃ Temp. / Humidity Cycle After the test the part shall meet specifications without any degradation in appearance and performance except SPL. after 4 hours at +25℃, The SPL shall be in ± 10 dBA compared with initial one. a, b: 90~98%RH c: 80~98%RH +25℃ a b 3hrs 12±0.5hrs 3hrs c 24hrs D: RELIABILITY TEST No. Item Test condition □ Applying rated voltage, rated frequency, square wave , 1/2 duty cycle： 1 Operating life test Ordinary temperature The part shall be subjected to 96 hours at room temperature. TEST CONDITION. Standard Test Condition : a)Temperature: +5~+35℃ b)Humidity:45~85% Judgment Test Condition :a)Temperature:+25±2℃ b)Humidity:60~70% Evaluation standard After the test the part shall meet specifications without any degradation in appearance and performance except SPL. after 4 hours at +25℃,The SPL shall be in ± 10 dBA compared with initial one. c)Pressure: 860~1060mbar c)Pressure: 860~1060mbar 4/7 Evaluation standard 95% Min. lead terminals shall be wet with solder E:MECHANICAL CHARACTERISTICS No Item Test condition Lead terminal are immersed in rosin for 5 seconds and then immersed in Solder bath of +260±5℃ for 3±0.5 Solder ability 1 second 2 3 4 5 6 Soldering Heat Lead terminal are immersed in soldering bath of Resistance +260±5℃ for 5±0.5 Second. Hand Soldering Lead terminal are soldering of +350±5℃, 2.0±0.5 Heat Resistance Second. Terminal Mechanical Strength Vibration Drop test No interference in operation Apply the terminal with 9.8N(1kg) strength for 10±1 sec. The part shall be subjected to a vibration cycle of 10Hz to 55Hz in a period of 1 minute. Total peak amplitude shall be 1.52mm(9.3G). The vibration test shall consist of 2 hours per axis in each three axes(X、Y、Z). The part only shall be dropped from a height of 75cm onto a 40mm think wooden board 1 times. No damage and cutting off After the test the part shall meet specifications without any damage in appearance and performance except SPL. The SPL shall be in ± 10 dBA compared with initial one. ( ) * Wave Soldering profile of lead-free Temp.(° C) Max. 10 sec. 250°C 245°C 235°C 200K/s--130°C ---5K/s 100°C ---forced cooling 50°C 0 0 50 100 150 200 250 300 Time(sec) Recommendable wave soldering condition is as follows. Note 1: It is requested that wave soldering should be executed after heat of product goes down to normal temperature. Note 2: Peak wave temperature of 235°C ~ 250° C maximum of 10 sec. . 5/7 F: MEASUREMENT METHOD +Vcc BZ Vo-p Magnetic Transducer 180 VCE OV G: INSPECTION FIXTURE Magnetic Transducer 40cm 10cm Sound Level Meter TES1350A