UNE EN 1149-1 Electrostatic properties. Surface resistivity (test methods and requirements)
Fabrics which meet this EN ISO standard:
This test method is not applicable to fabrics with conductive fiber core.
Test method: the sample is placed on an insulating base plate, then place the group of electrodes on the sample, apply a continuous stream and measure the resistance of the sample
Requirements: the surface resistivity must be less than 5 · 1010 Ω
The inhomogeneous material must have a conductive yarn net and the maximum distance between this conductive threads must be of 10 mm.
UNE EN 1149-2 Electrostatic properties. Test methods for measurement of the electrical resistance through a material (vertical resistance)
This standard does not apply to specify the protection against electrical stresses
The electrodes are placed on opposite surfaces of the test material. Apply a DC voltage to the electrodes and determining the electrical resistance of the tested material
UNE EN 1149-3 Electrostatic properties. Test methods for measurement of charge decay
The test methods are applicable to all materials, including homogeneous materials and heterogeneous forms of fiber materials with conducting surface and / or conductive fibers with conductive fiber core.
Charging by induction: the burden of the test sample is performed by inductive effect. Immediately below the test sample, which remains horizontal and no contact with it, an electrode is placed in the field. The field electrode is subjected to high voltage abruptly. If the sample is conductive or contain conductive elements is induced on it a charge opposite to the field electrode. Electrode field incident on the conductive elements does not cross the sample and the resulting field is reduced in a manner that is characteristic of the material tested. This effect is measured and recorded by behind of the sample with a probe of appropriate action.
EN 1149-5 Electrostatic properties. Material performance and design requirements
This standard specifies requirements for materials and design of protective clothing with electrostatic dissipation, used as part of a complete set grounded to avoid incendiary discharges. These requirements may not be sufficient in flammable atmosphere rich in oxygen. This European Standard is not applicable for protection against voltage.
- surface resistance equal to or less than 2.5 x 109 Ω in at least one of the surfaces tested according to the norm EN 1149-1