The Control of Excess Humidity in Avionics Cooling
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Product Code: ARP987
Revision Number: A
Date Published: 1997-10-01 - A newer version of this standard is available.
Date Reaffirmed: October 2003
Issuing Committee:
Ac-9 Aircraft Environmental Systems Committee
Scope
The purpose of this document is threefold: (1) to review the problem of moisture in avionics equipment, (2) to outline methods for correcting conditions of excess moisture in existing avionics installations, and (3) to recommend design practices for new avionics cooling system installations which will minimize the adverse effects of moisture. The problem of moisture in avionics has been brought into focus by the widespread use of air cycle refrigeration in forced-cooled "black-boxes," and by the lack of recognition of the moisture sensitivity of most avionic circuitry. This document does not relieve the avionics designer of his obligation to meet any other humidity requirements which may be applicable to the avionics. Because the air conditioning system is inoperative when the aircraft is parked or stored, the aircraft and its equipment must withstand the effects of the outdoor environment (e.g., humidity, fog, rain, and surface condensation).
Product Status: In Stock
File Size:
608K
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| Current & Historical versions of this standard |
|---|
| Standard |
Date published |
?Status |
| ARP987B |
2010-06-17 |
Revised |
| ARP987A |
1997-10-01 |
Reaffirmed |
| ARP987 |
1970-03-01 |
Issued |
|
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