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PUI Audio, Inc. A Projects Unlimited Company, 3541 Stop Eight Road, Dayton, OH 45414

Tel: (937) 415-5901 Fax: (937) 415-5925

Reliability Testing

Type of Test

Test Specifications

High Temperature Test

200 hours at +70°C ± 3°C followed by two hours in

normal room temperature

Low Temperature Test

200 hours at -25°C ± 3°C followed by two hours in

normal room temperature

Humidity Test

200 hours at +40°C ± 3°C with relative humidity at

90% to 95% followed by 2 hours in normal room

temperature

Temperature Cycle Testing

30 minutes at -25°C, 10 minutes at 20°C, 30

minutes at +70°C, 10 minutes at 20°C for five

cycles, followed by 2 hours in normal room

temperature

Vibration Test

10 to 55 Hz for 1 minute with 1.52mm distance,

followed by a two hour 3 axis test in packaging

Drop Test

Drop microphones in packaging onto concrete

floor from 1 meter height in each of 3 axis

ESD Test (according to IEC 6100)

1. Contact discharge - Discharge 6000 VDC

from capacitor into microphone output

through 330Ω resistor ten times.

2. Air discharge - Discharge 8000 VDC into

sound hole of the microphone ten times.

After each test, the speaker’s SPL shall be ±3 dB of the original SPL

Dimensions

Recommended Drive Circuit