RTCA DO-160 Temperature & Altitude Testing

Altitude Testing

Currently, D.L.S. performs the entire environmental suite of tests up to the current revision level of G. These tests are often performed in addition to EMI-related tests.

Please contact us to request a quote for this or any of our other compliance programs.

Section 4 - Temperature and Altitude:

Equipment Categories

Category A1

Equipment intended for installation in a controlled temperature and pressurized location, on an aircraft within which pressures are normally no lower than the altitude equivalent of l5,000 ft Mean Sea Level (MSL), is identified as Category A1. This category may also be applicable to equipment installed in temperature controlled but unpressurized locations on an aircraft that operates at altitudes no higher than 15,000 ft MSL.

Category A2

Equipment intended for installation in a partially controlled temperature but pressurized location on an aircraft within which the pressures are normally no lower than the altitude equivalent of 15,000 ft. This category may also be applicable to equipment installed in partially controlled temperature but unpressurized locations on an aircraft that operates at altitudes no higher than 15,000 ft

Category A3

Equipment intended for installation in a controlled or partially controlled temperature but pressurized location within an aircraft within which the pressures are normally no lower than the altitude equivalent of 15,000 ft , where the temperatures will be more severe than those for categories A1 and A2.

Category A4

Equipment intended for installation in a controlled temperature and pressurized location, on an Mean Sea Level (MSL), . This category may also be applicable to equipment installed in a temperature controlled but unpressurized locations on an aircraft that operates at altitudes no higher than 15,000ft.

Category B1

Equipment intended for installation in a non-pressurized but controlled temperature location in an aircraft that is operated at altitudes up to 25,000 ft

Category B2

Equipment intended for installation in non-pressurized and non-controlled temperature locations on an aircraft that is operated at altitudes up to 25,000 ft

Category B3

Equipment intended for installation in the power plan t compartment of an aircraft that is operated at altitudes up to 25,000 ft

Category B4

Equipment intended for installation in a non-pressurized location on an aircraft that is operated at altitudes up to 25,000 ft B2, is identified as Category B4.

Category C1

Equipment intended for installation in a non-pressuri zed but controlled temperature location in an aircraft that is operated at altitudes up to 35,0 00 ft

Category C2

Equipment intended for installation in non-pressurized and non-controlled temperature locations within an aircraft that is operated at altitudes up to 35,000 ft.

Category C3

Equipment intended for installation in the power plan t compartment of an aircraft that is operated at altitudes up to 35,000 ft

Category C4

Equipment intended for installation on a non-pressurized aircraft that is operated at altitudes up to 35,000 ft (, for which temperature requirements differ from C1 and C2.

Category D1

Equipment intended for installation in a non-pressurized but controlled temperature location on an aircraft that is operated at altitudes up to 50,000 ft .

Category D2

Equipment intended for installation in non-pressurized and non-controlled temperature locations on an aircraft that is operated at altitudes up to 50,000 ft

Category D3

Equipment intended for installation in the power plan t compartment of an aircraft that is operated at altitudes up to 50,000 ft .

Category E1

Equipment intended for installation in non-pressurized and non-controlled temperature locations on an aircraft that is operated at altitudes up to 70,000 ft

Category E2

Equipment intended for installation in the power plan t compartment of an aircraft that is operated at altitudes up to 70,000 ft

Category F1

Equipment intended for installation in non-pressuri zed but controlled temperature locations on an aircraft that is operated at altitudes up to 55,000 ft

Category F2

Equipment intended for installation in non-pressurized and non-controlled temperature locations on an aircraft that is operated at altitudes up to 55,000 ft

Category F3

Equipment intended for installation in the power plan t compartment of an aircraft that is operated at altitudes up to 55,000 ft

Operating High Temperature

Maximum levels that the equipment will be exposed to within the particular installation area, e.g. in an enclosed space behind an instrument panel, equipment racks, power plant areas, etc., under normal operating conditions.

Short-Time Operating Temperature

Start up conditions where equipment is turned on following a ground soak. It is expected that these temperature conditions will occur infrequently and be of short duration, since cooling or heating air circulation or other means of controlling temperature would be enabled concurrent with equipment operation.

Ground Survival Temperatures

Lowest and highest ground temperatures that the equipment is normally expected to be exposed to during aircraft storage or exposure to climatic extremes. The equipment is not expected to operate within specification limits at these temperatures but is expected to survive without damage.

In-Flight Loss of Cooling

This condition represents the failure of the external or internal system that normally provides dedicated cooling for the equipment. Certain equipment must survive for a limited time in the absence of cooling. Test requirements for this type of equipment shall be specified in the equipment performance specification

In Flight Loss of Cooling Categories

Category V - 30 minutes minimum
Category W - 90 minutes minimum
Category P - 180 minutes minimum
Category Y - 300 minutes minimum
Category Z - As defined in the equipment specification

Altitude, Decompression and Overpressure Tests

Category A
Category B
Category C
Category D
Category E

 

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