Acoustical Specifications; Gas And Particulate Exposure - IBM TS3500 Introduction And Planning Manual

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Table 39. Gas and particulate exposure (continued)
| | Contaminate
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Particulate contamination
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Notes:
| 1. ANSI/ISA-S71.04. 1985. Environmental conditions for process measurement and control systems: Airborne contaminants,
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Instrument Society of America, Research Triangle Park, NC, 1985.
| 2. The derivation of the equivalence between the rate of copper corrosion product thickness growth in Å/month
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and the rate of weight gain assumes that Cu
| 3. The derivation of the equivalence between the rate of silver corrosion product thickness growth in Å/month and
| the rate of weight gain assumes that Ag
| 4. The deliquescent relative humidity of particulate contamination is the relative humidity at which the dust
| absorbs enough water to become wet and promote ionic conduction.
| 5. Surface debris is randomly collected from 10 areas of the data center on a 1.5 cm diameter disk of sticky
| electrically conductive tape on a metal stub. If examination of the sticky tape in a scanning electron microscope
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reveals no zinc whiskers, the data center is considered free of zinc whiskers.
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Acoustical specifications

116
IBM System Storage TS3500 Tape Library with ALMS: Introduction and Planning Guide
S and Cu
2
S is the only corrosion product.
2
This section introduces acoustical specifications for the TS3500 Tape Library.
For the purposes of acoustical specifications, when the TS3500 Tape Library is both
operating and idling the following conditions apply:
v Power is on.
v All air-moving devices are operating.
v Tape cartridges are loaded in all drives.
When the library is operating, the cartridge accessor loads, unloads, or moves tape
cartridges; when the library is idling, the accessor does not move.
The TS3500 Tape Library is a Category 1 product as defined in C-S 1-1710-006.
Requirement
Data centers must meet the cleanliness level of ISO
14644-1 class 8. For data centers without airside
economizer, the ISO 14644-1 class 8 cleanliness might be
met simply by the choice of the following filtration:
v The room air might be continuously filtered with
MERV 8 filters.
v Air entering a data center might be filtered with
MERV 11 or preferably MERV 13 filters.
For data centers with airside economizers, the choice of
filters to achieve ISO class 8 cleanliness depends on the
specific conditions present at that data center.
The deliquescent relative humidity of the particulate
contamination should be more than 60% RH.3
Data centers must be free of zinc whiskers
O grow in equal proportions.
2
4
.
5
.