RTCA DO-160 Explosive Atmosphere Testing

Explosive Atmosphere 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 9 - Explosive Atmosphere:

D.L.S. Conformity Assessment is expanding their explosive atmosphere testing capabilities. This test is implemented to demonstrate equipment’s capability to operate in a flammable environment without causing an explosion, or to show that the design is able to prevent the explosion spreading outside of the enclosure of the equipment.

There are three types of explosive atmosphere tests:

Environment I

Atmosphere in a space in which uncovered flammable fluids or vapors exist, or can exist, either continuously or intermittently (e.g., in fuel tanks or within fuel systems).

Environment II

Atmosphere in which flammable mixtures can be expected to occur only as a result of a fault-causing spillage or leakage.

Environment III

Atmosphere within a designated fire zone.

Equipment Categories

Category A

Equipment is designed so that:
  1. In normal operation the temperature of any surface will not rise to a level capable of causing ignition, nor will any operating part cause ignition.
  2. Ignition of an explosive mixture is contained within the equipment without igniting an explosive atmosphere surrounding eut.
  3. During normal operation, or as a result of an y fault, the temperature of any external surface will not rise to a level capable of causing ignition.

Category E

Category E equipment is not hermetically sealed and not contained in cases designed to prevent flame and explosion propagation. Such equipment is not intended for installation in Environment I. Such equipment is designed so that in operation the temperature of any internal or external surface will not rise to a level capable of causing ignition, nor will any operating internal part cause ignition so that it meets the non ignition test.

Category H

Category H equipment, including those hermetically sealed, contains hot spot surfaces (external or internal) and is non-spark producing under normal operating conditions. Such equipment is designed so that in normal operation the temperature of any internal or external surface will not rise to a level capable of causing ignition so that it meets the components or surface temperature test. Hermitically sealed equipment meeting temperature requirement on external surface shall be identified as Category H equipment.

Please contact D.L.S. at 847-537-6400 with all DO-160 and MIL-STD 810 Explosive Atmosphere testing needs.

 

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