Characteristics
Temperature
Operating
Nonoperating (Storage)
Altitude
Operating
Nonoperating (Storage)
Humidity
Operating and Storage
Vibration (operating)
Not Rack Mounted
Rack Mounted
Shock (operating and nonoperating)
Not Rack Mounted
Rack Mounted
Transit Drop (not
in
shipping package)
Specification-2445A/2455A
Service
Table
1-7
Environmental Requirements
Performance Requirements
Environmmental requirements qualify the electrical and mechanical
specifications. When not rack mounted, the instruments meet the
environmental requirements
of
MIL-T-28800C for Type Ill, Class 3,
Style C equipment, with the humidity and temperature requirements
defined
in
paragraphs 3.9.2.2, 3.9.2.3, and 3.9.2.4. Rack mounting
changes the temperature, vibration, and shock capabilities. The
rack mounted instruments meet
or
exceed the requirements
of
MIL-T-28800C with respect
to
Type Ill, Class
5,
Style C equipment
with the rack-mounting rear-support kit installed. Rack mounted
instruments will
be
capable
of
meeting
or
exceeding the
requirements
of
Tektronix Standard 062-2853-00, class
5.
-15°C
to
+55°C.
For a rack mounted instrument, ambient temperature should
be
measured at the instrument's air inlet. Fan exhaust temperature
should not exceed
+65°C.
-62°C
to
+85°C.
To 15,000 feet. Maximum operating temperature decreases 1
°C
for
each 1000 feet above 5000 feet.
To 50,000 feet.
Stored at 95% relative humidity for five cycles (120 hours) from
30°C
to
60°C, with operational performance checks at
30°C
and
55°c.
15 minutes along each
of
three axes at a total displacement
of
0.025 inch p-p
(4
g at 55
Hz),
with frequency varied from 10 Hz
to
55 Hz in one minute sweeps. Hold 10 minutes at each major
resonance or, if none exists, hold 10 minutes at 55 Hz (75 minutes
total test time).
Change displacement
to
0.015 inch p-p (2.3 g at 55 Hz).
50 g, half sine,
11
ms duration, three shocks on each face, for a
total of 18 shocks.
30
g.
8-inch drop on each corner and each face (MIL-T-28800C, para.
4.5.5.4.3).
1-19
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