page

date

DESCRIPTION: piezo audio indicators

4 of 5

11/12/2007

20050

phone

phone 503.612.2300 fax

fax 503.612.2383

PART NUMBER: CPE-350

RELIABILITY TEST

item

test condition

operating (life test)

1. Continuous life test:

The part will be subjected to 48 hours of

continuous operation at +70°C with rated

voltage applied.

2. Intermittent life test:

A duty cycle of 1 minute on, 1 minutes off, a

minimum of 5,000 times at room temp

(+25 ±2°C) with rated voltage applied.

evaluation standard

The buzzer will be measured after

being placed at +25°C for 4

hours. The value of the

oscillation frequency/current

consumption should be ±10%

compared to the initial

measurements. The SPL should

be within ±10dB compared to

the initial measurements.

TEST CONDITIONS

standard test condition

a) tempurature: +5 ~ +35°C

b) humidity: 45 - 85%

c) pressure: 860-1060 mbar

judgement test condition

a) tempurature: +25 ±2°C

b) humidity: 60 - 70%

c) pressure: 860-1060 mbar