Exabyte 221L, Product Manual

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176
P
RODUCT
M
ANUAL
1014258
A
PPENDIX
A—L
IBRARY
S
PECIFICATIONS
A
COUSTIC
N
OISE
L
IMITS
The overall, averaged A-weighted sound pressure level (in decibels) for the
library does not exceed the upper limits specified in Table A-7 .
S
HOCK AND
V
IBRATION
L
IMITS
The library will operate normally after experiencing shock loads as specified in
Table A-8 . The operating shock levels indicate how much shock the library can
withstand while the enclosed tape drives are reading and writing data. The
non-operating and storage shock levels indicate how much shock the library
can withstand when it is not operating. After experiencing this amount of
shock, the library will operate normally.
Table A-9 lists the vibration specifications for the library during operation,
non-operation, storage, and transportation. The operating specifications
indicate the amount of vibration the library can withstand while the enclosed
tape drives are reading and writing data.
Table A-7 Acoustic noise limits
Operating Mode Lp
A
a
a
L
pA
is the average A-weighted sound pressure level over the following frequency range: 5 Hz to 12.5 KHz.
The library is powered on and idle. 48 dBA
The library is operational (the robot is moving); the tape
drives are operating in streaming mode.
55 dBA
b
b
Represents a maximum sustained operational level.
Table A-8 Shock limits
Operating
a
Storage
b
or
Non-Operating
c
Transportation
b
Handling
3g for 5 msec
d
20g for 8 msec
e
ISTA Procedure 1D Drop and Topple per IEC 68-2-31
a
The library is unpacked and is picking and placing cartridges from the data cartridge magazine and tape drives.
b
The library has not been unpacked.
c
The library has been unpacked, but no power has been applied.
d
A minimum of 20 shock pulses were applied to the vertical axis. The shock pulses were half-sine waves and were applied at a rate not
exceeding one shock per second.
e
A minimum of three 20g shock pulses were applied to each of the library’s six sides.
Table A-9 Vibration limits
Random Vibration
a
Applied During Operation
1 Hz PSD = 0.0000040 g
2/
Hz
5 Hz PSD = 0.0000270 g
2
/Hz
10-150 Hz PSD = 0.0004048 g
2
/Hz
200-400 Hz PSD = 0.0001079 g
2
/Hz