NEC ShieldPRO FC-N21S Brochure & Specs page 5

■ Drop test
● Onto plywood
While turned off, the device is dropped once from a height of 90 cm onto plywood on each
face, side and corner for a total of 26 drops.
● Onto concrete
While turned off, the device is dropped once from a height of 90 cm onto concrete on each
face for a total of 6 drops.
■ Vibration test
● Sine wave vibration (vibration time 56 minutes)
While turned on, the device is subjected to vibration at the following frequencies: 10 – 55
Hz: 0.075 mm (0-P), 55 Hz – 500 Hz: 9.8 m/s2 (0-P).
While turned off, the device is subjected to vibration at the following frequencies: 10 – 55
Hz: 0.15 mm (0-P), 55 Hz – 500 Hz: 19.6 m/s2 (0-P).
●Random wave vibration (vibration time 60 minutes)
While turned off, the device is subjected to vibration at the following frequencies: 20 Hz
– 1000 Hz: 0.04 G2.Hz, 1000 Hz – 2000 Hz: -6dB/Octave.
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