电燃烧器

The electrical burner test according to NF P 92-503 is the reaction to fire main test for M classification of building and fitting materials. It is used for flexible materials with a thickness lower than or equal to 5 mm, for tight fitting flexible wall and ceiling coatings of any thickness and for flexible filtering media of any thickness.

• A metal frame comprising a pedestal and two posts inclined of 30° over which comes to fall the test piece holder mechanism. This one includes the test piece holder grill and the insulating incombustible plate designed to cover the test piece after it has been set up and used to channel the hot gases coming from the test piece. The inflammation system comprises a batwing burner supplied with propane gas, welded to a metallic pipe which swivels round an axis fixed to the pedestal. In contact position, the flame shall come into contact with the lower face of the test piece. A ball flowmeter to be inserted in the gas supply circuit is used to measure the gas flow corresponding to the flame height according standard specifications.


• A 500 W electrical burner comprises a ceramic body in which is accommodated a removable sleeve in porous ceramic ; this one is fitted with an electrical resistance and contains a helical metal device designed to homogenize the air temperature. The electrical burner is fixed on a metal pedestal pierced by holes to enable air to enter and circulate inside the sleeve and leave by the upper section. The whole, fully complying NF P 92-503 of 1995, can be delivered with a calibration certificate issued by an accredited laboratory (in addition). A screen plate made of incombustible material is fixed on the apparatus frame and has a hole suitable for the electrical burner to pass through ; it also comprises a rectangular opening on a side enabling the flow of fresh air.


• An automation control box (common to PolyNormes 503 and 504) with push-button control takes over the control instructions of the test configured and initialized by software ; it transfers in real time to the PC, by RS 232 connection, the durations of inflammation taken by the push-button after each withdrawing of the pilot flame.


• The data acquisition and control software named « FEU » can be used equally well for PolyNorme 503 or PolyNorme 504 operation. Recognition of the apparatus is done by switching it on. From then on, the software transmits to the automation control box the instruction for test initialization. If the test piece holder mechanism is not in initial position at the test start, an error message is displayed and the test does not start. The software acquires durations of inflammation taken by the push-button after each withdrawing of the pilot flame. A report is edited at the test end comprising heading, data and final comments on each test piece.

• A low voltage (L.V.) transformer 220 V / 48 V with voltmeter for the electrical burner supply is included at the delivery. On the other hand, it is compulsory to get an autotransformer in order to adjust the serviceable voltage to the value given in the official calibration certificate.

N.B. Are not included in the supply of the PolyNorme 503, a pressure reducer with manometer and a flowmeter for propane gas control, nor autotransformer and voltage stabilizer (if necessary), nor a PC-type microcomputer, nor a hood which are usually available in a laboratory. Nevertheless, it is still possible to get these accessories on request.

The electrical burner test involves submitting, under defined conditions, the test piece to the action of a heat radiation and hot gases sweeping the surface of the test piece, thus enabling the progress and the propagation of the flame. A pilot flame produced by a batwing burner supplied with propane gas is applied at at times scheduled by the standard and is used to ignite the evolved gases and possibly cause the inflammation of the material.


For each test, the time to inflammation, the persistence of the flame, the nature and the effects of combustion are noted.

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