IBM DS8880 Series Introduction And Planning Manual page 178

Contamination information
You must consider the air quality and contamination levels at your installation site.
Airborne particulates (including metal flakes or particles) and reactive gases that
act alone or in combination with other environmental factors, such as humidity or
temperature, might pose a risk to the storage system hardware. Risks that are
posed by the presence of excessive particulate levels or concentrations of harmful
gases include damage that might cause the system to malfunction or cease
functioning altogether. This specification presents limits for particulates and gases
that are intended to avoid such damage. The limits must not be viewed or used as
definitive limits because numerous other factors, such as temperature or moisture
content of the air, can influence the impact of particulates or environmental
corrosives and gaseous contaminant transfer.
Attention: In the absence of specific limits that are presented in this document,
you must implement practices that maintain particulate or gas levels that are
consistent with the protection of human health and safety. If IBM determines that
the levels of particulates or gases in your environment damaged the storage
system, the warranty is void. Implementation of correctional measures is a
customer responsibility.
The following criteria must be met:
Gaseous contamination
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DS8880 Introduction and Planning Guide
Table 88. Vibration levels
Class
V1L
Notes:
1. All values in this table are in g
2. g is the peak g level of an approximate half-sine pulse.
Table 89. Random vibration PSD profile breakpoints
Class 5 Hz 17 Hz
-7 -5
V1L 2.0x10 2.2x10
Note: All values in this table are in g
Table 90. Operational shock levels
Class Axis
S1 Vertical
Notes:
1. g is the peak g level of an approximate half-sine pulse.
2. "pw" is the pulse width in milliseconds.
Severity level G1 according to ANSI/ISA 71.04-1985
reactivity rate of copper coupons must be fewer than 300 Angstroms per
month (Å/month,
reactivity rate of silver coupons must be less than 300Å/month ( 0.0035
µg/cm2-hour weight gain)
is conducted approximately 2 inches (5 cm) in front of the rack on the air
inlet side at one-quarter and three-quarter frame height off the floor, or
where the air velocity is much higher.
grms
0.10
2
/Hz
45 Hz 48 Hz 62 Hz
-5 -5 -5
2.2x10 2.2x10 2.2x10
2
/Hz.
1
g
3.5
0.0039 µg/cm2-hour weight gain)
3
. The reactive monitoring of gaseous corrosivity
1, 2
g Peak Sine
0.06 @ 50 and 60 Hz
65 Hz 150 Hz 200 Hz
-5 -5
2.2x10 2.2x10 2.2x10
2
pw
3.0
1
, which states that the
2
. In addition, the
500 Hz
-5 -5
2.2x10