page
date
4 of 5
11/12/2007
PART NUMBER: CPE-270
DESCRIPTION: piezo audio indicators
RELIABILITY TEST
item
test condition
evaluation standard
operating (life test)
1. Continuous life test:
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
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.
measurements. The SPL should
be within ±10dB compared to
the initial measurements.
TEST CONDITIONS
standard test condition
judgement test condition
a) tempurature: +5 ~ +35°C
a) tempurature: +25 ±2°C
b) humidity: 45 - 85%
b) humidity: 60 - 70%
c) pressure: 860-1060 mbar
c) pressure: 860-1060 mbar
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20050 SW 112 Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383
CUI [ CUI INC ]
