Chapter 7. Appendix: Specifications
Table 7.2.1 – continued from previous page
Relative humidity percentage range for storage
10% ~ 95% (non-condensing)
Relative humidity percentage range for operating
10% ~ 85% (non-condensing)
Vibration for storage
1.87 Grms (10-500 Hz)
Vibration for operating
0.26 Grms (5-350 Hz)
Shock for storage
65G for 2ms
Shock for operating
5G
Altitude for storage
12,000m (39,370 ft)
Altitude for operating
3,048m (10,000 ft)
7.2.1 Air Quality Requirements
The air must be free of:
• corrosive dust and/or corrosive contaminants
• conductive dust or conductive particles (such as zinc whiskers)
Airborne residual dust must have a deliquescent point* less than 60% relative humidity. (*The relative
humidity at which crystalline materials begin adsorbing large quantities of water from the atmosphere.)
Gaseous corrosion level in terms of (in Angstrom) as per ISA:
• Copper reactivity rate must be less than 300 Å/month, class G1(ANSI/ISA71.04-1985).
• Silver reactivity rate must be less than 200 Å/month (AHSRAE TC9.9).
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