IBM eserver pSeries 7311 D10, Руководство по обслуживанию

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Acoustical Noise Emissions
The equivalent continuous A-weighted sound pressure level at workstations (emission sound pressure
level at the 1-meter bystander positions) does not exceed 70 dB(A).
Der Geräuschpegel der Einheit ist kleiner oder gleich 70 db(A).
pSeries 7311 Model D10 Declared Acoustical Noise Emissions
Acoustical Characteristic
Product Configuration Declared A-Weighted Sound Power
Level, L
WAd
(B)
Declared A-Weighted Sound
Pressure Level, LpAm (dB)
Operating Idle Operating Idle
One D10 I/O subsystem 5.6
5
5.6
5
40
6
40
6
Two D10 I/O subsystems 5.9
5
5.9
5
43
6
43
6
Four D10 I/O subsystems 6.2
5
6.2
5
46
6
46
6
Notes:
1. Noise levels cited are for the typical configuration (A-Frame: Bulk Power, CEC cage, battery option, media
drawer, and two I/O drawers).
2. The 0.6-B (6-dB) reduction in noise emission levels with the acoustical rear door corresponds to a factor of 4
reduction. That is, the noise level of a single A-Frame with Slimline covers is about the same as the noise level of
four A-Frames with acoustical covers.
3. L
WAd
is the upper-limit A-weighted sound power level; LpAm is the mean A-weighted sound pressure level at the
1-meter bystander positions; 1 B = 10 dB.
4. All measurements made in conformance with ISO 7779 and declared in conformance with ISO 9296.
pSeries 7311 Model D20 Declared Acoustical Noise Emissions
Acoustical Characteristic
Product Configuration Declared A-Weighted Sound Power
Level, L
WAd
(B)
Declared A-Weighted Sound
Pressure Level, LpAm (dB)
Operating Idle Operating Idle
D20 I/O subsystem 6.1
5
6.0
5
44
6
43
6
Notes:
1. Noise levels cited are for the typical configuration (A-Frame: Bulk Power, CEC cage, battery option, media
drawer, and two I/O drawers).
2. The 0.6-B (6-dB) reduction in noise emission levels with the acoustical rear door corresponds to a factor of 4
reduction. That is, the noise level of a single A-Frame with Slimline covers is about the same as the noise level of
four A-Frames with acoustical covers.
3. L
WAd
is the upper-limit A-weighted sound power level; LpAm is the mean A-weighted sound pressure level at the
1-meter bystander positions; 1 B = 10 dB.
4. All measurements made in conformance with ISO 7779 and declared in conformance with ISO 9296.
182 Eserver
pSeries 7311 Model D10 and Model D20 Service Guide