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7. NOISE IS MEASURED AT RATED VOLTAGE IN ANECHOIC(在无响室额定电压下之噪音测试)
CHAMBER IN FREE AIR AS BELOW(在空气自由流动的测试室):
1M
Airflow
(风流方向)
Fan(风扇)Microphone(麦克风)
Noise is measured rated voltage in free air in anechoic chamber with B & KSound level meter with microphone at a
distance of one meter from the fan intake.The background noise is 18dBAmax.
(在背景噪音不超过 18dB(A)的无响室内,将待测风扇通入额定的工作电压,悬掉入空中,将麦克风放于风扇同一平面且离待
测风扇进风口一米处进行测试其 B&K 值。)
8.RELIABILITY(可靠度测试):
8-1. HUMIDITY EXPOSURE
(耐湿测试)
TEMPERATURE(温度): +25℃~ +65℃
HUMIDITY(湿度): 90-98% RH @ +65℃
FOR 4 HOURS/CYCLE(4小时为一测试周期)
POWER(通电状况): NON-OPERATING(无通电)
TEST TIME(测试时间): 168 HOURS(小时)
8-2. VIBRATION
(振动测试)
TEMPERATURE(温度): +25℃
ORIENTATION(方向): X, Y, Z
POWER(通电状况): NON-OPERATING(无通电)
VIBRATION LEVEL(振动标准): OVERALL gRMS=3.2
FREQUENCY(HZ)(频率 Hz)PSD(G^2/H
Z)
10 0.040
20 0.100
40 0.100
800 0.002
1000 0.002
TEST TIME: 2 HOURS ON EACH ORIENTATION
(测试时间:每个方向 2 小时)
8-3. MECHANICAL SHOCK
(机械震动测试)
TEMPERATURE: +20℃(温度: +20℃)
ORIENTATION: X, Y, Z(方向: X, Y, Z)
POWER: NON-OPERATING(通电状况: 无通电)
ACCELERATION: 20 G MIN(加速度: 20 倍重力加速度)
PULSE: 11 ms HALF-SINE WAVE(脉冲: 周期为 11 ms 的半波)
NUMBER OF SHOCKS: 5 SHOCKS
FOR EACH DIRECTION(震动次数:每方向震动 5 次)
8-4. LIFE
(寿命测试)
TEMPERATURE: +70℃(温度: +70℃)
POWER: OPERATING(通电状况: 通电)
DURATION: 1000 HOURS MIN(为期时间: 最小 1000 小时)