Humidifiers
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Don Holmgren djholm at fnal.govFri Jul 19 15:57:40 PDT 2002
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Another obscure reason for controlling the humidity of machine rooms is that tape drives usually have RH specifications that should be honored. We found out about this on an experiment at a telescope at 10,000 feet in New Mexico, where the humidity is usually very low. DLT tape cartridges have an RH specification of 20-80%. The explanation from Quantum was that the tape substrate takes up or releases moisture and changes thickness. Since high performance tape drives "fly" the tape over the head (there's an air bearing), the thickness of the tape makes a difference in error rate and also the life of the tape head. Or so we were led to believe. Don Holmgren Fermilab
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