 |
|||
|
|
|||
| ||||||||||
|
|  MIL-F-26301F
4.4.6.3 Hydraulic fluid resistance. Flashers shall be immersed in hydraulic fluid conforming to MIL-PRF-5606 for a
period of 1 hour at a temperature of 23C 5C. Flashers shall then be removed from the test fluid and allowed to
drain for 1 hour at room temperature. There shall be no swelling of seals, gaskets, or other components. There shall
be no separation of components, dissolving of compounds or adhesives, or deterioration that would cause the
flashers to fail if exposed to hydraulic fluid in service.
4.4.7 Shock (see 3.10). Flashers shall be subjected to method 516, procedure I, of MIL-STD-810 (half-sine shock
wave). Three shocks, each having an acceleration of 30 3 G's and a duration of 9.0 2.0 milliseconds, shall be
applied in each of the three mutually perpendicular directions. Flashers shall then be tested as specified in 4.4.2.1.1
and 4.4.2.1.2, as applicable, except that the flashers shall be operated at rated input voltage and rated lamp load
(see 3.1).
4.4.8 Altitude (see 3.11). Flashers shall be subjected to altitude testing in accordance with procedure II, method
500, of MIL-STD-810. Reduce internal pressure to 1.32 inch of Hg or 70,000 feet above sea level.
4.4.9 Humidity (see 3.12). Flashers shall be subjected to humidity test in accordance with procedure I, method
507, of MIL-STD-810, except that the temperature and humidity in the chamber shall be +49C (+120F) and 95
percent, respectively. At the end of the 24-hour period, the flashers shall be tested as specified in 4.4.2.1 and
4.4.2.2, as applicable, at rated input voltage and rated lamp load (see 3.1).
4.4.10 Salt fog (see 3.13). Flashers shall be subjected to the salt fog test specified in procedure I, method 509, of
MIL-STD-810. After exposure, the flashers shall be washed, shaken, air blasted, and then permitted to dry for 48
hours at room temperature. The flashers shall then be visually examined. There shall be no physical damage which
would interfere with the operation or use of the flashers. Flashers shall then be tested as specified in 4.4.2.1.1 and
4.4.2.1.2, as applicable, except that flashers shall be operated at rated input voltage and rated lamp load (see 3.1).
Flashers shall again be operated and inspected 48 hours later.
4.4.11 Sand and dust (when specified) (see 3.1 and 3.14). Flashers shall be tested as specified in method 510 of
MIL-STD-810. Flashers shall then be tested as specified in 4.4.2.1.1 or 4.4.2.1.2, as applicable.
4.4.12 Electromagnetic interference (see 3.15). Flashers shall be subjected to electromagnetic interference as
specified in MIL-STD-461, equipment class A-1. During this test the flashers shall be operating an electrical load in
accordance with 4.4.14. The radio noise caused by the flashers shall be within the specified limits both before and
after the test. During testing, flashers shall be loaded in accordance with 4.4.14 except minimum rated lamp loads
shall be applied. Following the test, flashers shall meet the requirements of 4.4.2.1 and 4.4.2.2, as applicable, except
flashers shall be tested at rated input voltage and rated lamp load (see 3.1).
4.4.13 Transient voltage (see 3.16). Flashers shall be subjected to a total of 80 transient voltage pulses applied to
the input (control power) terminals. A resistive load of the applicable lamp voltage and current rating shall be
connected to the output (lamp load) circuit. Flashers requiring dc control power shall be tested as follows: With the
flasher operating at normal voltage, 20 voltage pulses shall be applied across the input terminals when the flasher
output circuit is in the nonconducting or "load off" condition. Negative polarity shall be applied to the flasher "positive"
terminal, and positive polarity to the flasher "negative" terminal. Repeat the test with 20 additional pulses applied
when the flasher is in the conducting or "load on" condition. Pulse voltage shall be 286 +0, -5 percent of rated
voltage. Forty additional pulses shall be applied as above except that a positive pulse voltage shall be applied to the
flasher control "positive" terminal and a negative pulse voltage to the "negative" terminal. Duration of applied transient
voltage shall be 0.1 second, minimum. Flashers requiring ac control power shall be tested similarly to the flasher
units having dc control power except that only 40 pulses are required. The peak pulse voltage shall be 166 +0, -5
percent of the rated rms voltage. Twenty pulses shall be applied when the flasher output is in the nonconducting or
"load off" condition and 20 pulses shall be applied when the flasher output circuit is in the "load on" condition.
Duration of the ac pulse transient shall be 0.30 second minimum. After the specified pulses have been applied, the
flashers shall be tested to determine compliance with 4.4.2.1 and 4.4.2.2, as applicable.
10
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals