NEC EXPRESS800, Service Manual

Page: 20 / 78

2-4 Planning Your Site
Environmental Conditions
The location should be examined for the following environmental hazards:
!
Dust - floating dust must be kept to no more than 0.3 mg/m
3
. Dust should
be held to less than 0.15 mg/m
3
.
!
Radio Frequency (RF) - Normally, there is no need to worry about the
effect of radio frequency interference on computer operations. In areas
where strong waves are generated or where a high-frequency device is
installed on the same floor as the server, radio frequency can affect the
functionality of the system.
!
Magnetic Fields (MF) - Normally, there is no need to worry about the
effect of magnetic fields on computer operations. If the server is installed
near cables or transformers that permit the flow of high currents,
functionality can be affected.