Seagate ST251 Product Manual page 14

1.8.3 RELATIVE HUMIDITY
Operating:
Maximum Wet Bulb:
Nonoperating:
1.8.4 ALTITUDE LIMITS
Operating:
Nonoperating:
8 to 80% noncondensing
26°C (78.8°F)
5 to 90% noncondensing
-1,000 ft to 10,000 ft
-1,000 ft to 30,000 ft
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It has been type tested and found to comply with the limits for a Class
B computing device peripheral in accordance with the specifications
in Subpart
J
of Part 15 of FCC rules, which are designed to provide
reasonable protection against such interference in a residential instal-
lation. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause interference
to radio or television, which can be determined by turning the equip-
ment on and off, you are encouraged to try one or more of the following
corrective measures:
• Reorient the receiving antenna.
• Move the device to one side or the other of the radio or TV.
1.8.5 SHOCK AND VIBRATION SPECIFICATIONS
All shock and vibration specifications assume that the drive is mounted
in an approved orientation with the input levels at the drive mounting
screws.
Shock measurements are based on a
11
msec. half-sine wave shock
pulse. The nonoperating specifications assume that the read/write
heads are positioned in the shipping zone.
1.8.5.1 OPERATING SHOCK
Maximum shock without incurring physical damage or degradation in
performance: 10 G's.
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• Move the device farther away from the radio or TV.
• Plug the computer into a different outlet so that the receiver and
computer are on different branch outlets.
If necessary you should consult your dealer or an experienced radio/
television technician for additional suggestions. You may find helpful
the following booklet prepared by the Federal Comunications Com-
mission: How to Identify and Resolve Radio-Television Interference
Problems. This booklet is available from the Superintendent of Docu-
ments, U.S. Government Printing Office, Washington, DC 20402. Refer
to publication number 004-000-00345-4.
1.11 MOUNTING REQUIREMENTS
1.8.5.2 OPERATING VIBRATION
Maximum vibration, at the following frequencies, without incurring
physical damage or degradation in performance:
Freq.
5-22 Hz:
22-300 Hz:
300-22 Hz:
22-5 Hz:
Vibration
0.010 in. Displacement (double amplitude)
0.25 G Acceleration (peak)
0.25 G Acceleration (peak)
0.010 in. Displacement (double amplitude)
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The drive may be mounted horizontally with the PC Board down or on
either side. Mounting vertically on either end is a prohibited orienta-
tion. Refer to Figure 3 on page 1-12 for mounting dimensions.
The drive should not be tilted front or back, in any position, by more
than 5°. For optimum performance the drive should be formatted in
the same position as it will be mounted in the host system.
1.11.1 SHOCK MOUNTING RECOMMENDATIONS
It is recommended that any external shock mounts between the drive
and the host frame be designed so that the composite system has a
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8T251/251 R/277R Product Manual, Rev.A 8T251/251 R/277R Product Manual, Rev.A
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