This test gives a first impression of the explosive behavior of a substance. The screening test in the modified Hartmann device determines whether the powder cloud, with an energy of approximately 10J, may be ignited by contact with an external source of ignition. Execution according to VDI 2263 Blatt 1.
Should it emerge from this test that the substance did not ignite, then supplementary tests in a 20 liter test sphere (2kJ ignition energy) should be performed to check whether the powder is explosive or not. Performed according to [EN 14 034 3 Annex C/VDI 2263, Blatt 1, 2.1.2.]