3-4. ENVIRONMENTAL CONSIDERATIONS
3-4-1. Reliability
and
Maintainability
Preventive Maintenance
(PM)
Meantime between failures (MTBF)
Meantime
to
repair (MTTR)
Component
life
Media life
Diskette Interchange
Soft
Read Error
Hard Read Error
Seek Error
3-4-2. Environmental
limits
Temperature
Operating:
Non-Operating:
Humidity
Operating:
Non-Operating:
Vibration
Operating:
Non-Operating:
Shock
Non-Operating:
Not
Required
8000
POH
30
min.
5 years
more
than
1.0
x
10
6
passes/track
30,000
times
1
per
10
9
bits read
1 per
10
12
bits read
1 per 1
0
6
seeks
40
0
F
to
115
0
F
(50
C
to
45
0
C)
-40
0
F
to
140
0
F
(_40
0
C
to
60
0
C)
(When OA-D30V
is
set
in
a box, this temperature means the
ambient
temperature
of
OA-D30V
in
the
box. And Tem-
perature
cycling shall
not
result
in
condensation.)
20
%
to
80
% relative humidity, with a
wet
bulb temperature
of
85
0
F (29
0
C)
and no condensation.
5
%
to
95
% relative humidity and no condensation.
The·
unit shall perform
all
read/write operations (no seek)
according
to
specifications, with continuous vibration
of
less
than
.5
G (±10
%),
from
5
Hz
to
100
Hz
(along
the
x, y, z plane).
The
unit when packed for
shipment
shall withstand ±2.0 G
from 5
Hz
to
100
Hz
along each
of
the
three mutually per-
pendicular axes.
The
unit
when unpacked shall withstand
60
G.
-8-
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