Proface APL3000B - Node Box PC - Manual (Page 26)

Chapter 2 Specifications
2-3
• When using any of the PS-B’s optional devices, be sure to check that device’s
specifications for any special conditions or cautions that may apply to its use.
• Be aware that not only does the Hard Disk have a fixed lifetime, but that
accidents can always occur. Therefore, be sure to back up your Hard Disk’s data
regularly, or prepare another Hard Disk unit that can be used for backup.
• The Hard Disk lifetime given here may be reduced due to unforeseen
environmental factors, however, generally speaking, the disk should last for
20,000 hours (of operation) or approximately 5 years, whichever comes first at an
operating temperature of 20°C and 333 hours of operation per month. (HDD
access frequency of 20% or less)
• Using the Hard Disk in an environment that is excessively hot and/or humid will
shorten the disk’s usage lifetime. A wet bulb temperature of 29°C or less is
recommended. This is equivalent to the following data.
• In order to extend the lifetime of the hard disk, Pro-face recommends you set the
Windows
®
2000’s [Control panel]-[Power Options]-[Turn off hard disks] selection
or the Windows
®
XP’s [Control panel]-[Performance and Maintenance]-[Power
Management option]-[Turn off hard disks] selection to turn the hard disk off when
the unit is not being operated. A setting of 5 minutes is recommended.
Temperature Humidity
at 35°C no higher than 64% RH
at 40°C no higher than 44% RH