ENDEVCO
www.endevco.com Tel: +1 (866) ENDEVCO [+1 (866) 363-3826]
IM 2680/5 083119
15
5.0
ENVIRONMENTAL CONSIDERATIONS
See the applicable product datasheet for applicable environmental
specifications and ensure that the airborne amplifiers are operating within
these specifications.
The airborne amplifiers are rated to 100% relative humidity and are in
compliance with MIL-STD-810D, Method 507.2, procedure III. In order
to comply with the specifications, the gain access screw must be solder-
sealed. The humidity rating does not include the cable’s connectors thus
some precautions may be necessary to protect the connectors.
5.1
EMC capability
The airborne amplifiers meet the requirements of MIL-STD-826, CLASS
Am. The 2680 is also in compliance with MIL-I-618D; MSFC-SPEC-279,
CLASS1; AF/BSD EXHIBIT 62-87.
5.2
Temperature Effects
Airborne amplifiers can be operated over a temperature of -67° F to 212°
F (-73° C to 100° C). The gain change over the operating temperature
range is illustrated in Figure 7.
% of maximum specified gain
Gain stability with temperature vs. gain setting
5.3
High temperature accelerometers
When accelerometers are exposed to high temperature extremes the
internal resistance decreases. High temperature accelerometers usually
specify resistance at room temperature and at the maximum temperature.
The specified source resistance of the 2680 is 3 M Ω, minimum.
Gain change in ± %
Figure 7: A near
linear plot of the
temperature effect
as a function of gain.
Each data point
is taken over the
operating temperature
range.
