5.10.2 Test of protection from water seepage and infiltration by foreign particles (degree of protection of the covering) If the manufacturer’s technical conditions state that the lux metre has a protective cover which makes it resistant to water seepage and infiltration by foreign particles, then it is verified during the test whether the measuring instrument meets the specified degree of protection.
5.11 Electromagnetic compatibility (EMC) tests 5.11.1 Resistance to electrostatic discharge Resistance to electrostatic discharge is tested on a lux metre when it is switched on, preferably using voltage of ±6 kV for contact discharge and ±8 kV for air discharge if contact discharge cannot be used. The discharges are applied to the lux metre’s covering and to the coupling panels in the vicinity of the lux metre.
In this test, the lux metre must demonstrate normal functioning within the limits of the maximum permissible error pursuant to Article 2.3, or it must ascertain a fatal error and react to it by the means defined.
5.11.2 Immunity to radiated radio frequency electromagnetic fields Resistance to high-frequency electromagnetic field radiation is tested on a lux metre when it is switched on in the following frequency zones and at the following test field intensities:
frequency 80 MHz to 800 MHz, intensity 3 V/m;
frequency 800 MHz to 960 MHz, intensity 10 V/m;
frequency 960 MHz to 1 400 MHz, intensity 3 V/m;
frequency 1 400 MHz to 2 000 MHz, intensity 10 V/m;
The test field’s specified intensity values apply to measurement without modulation. The test field’s amplitude is modulated with a depth of 80 %; the modulation signal has a sine wave with a modulation frequency of 1 kHz. The frequency step during the frequency sweep of the test field is maximum 1 %. The dwell time at each frequency may not be shorter than the time necessary to test the lux metre, including its ability to react to interference. However, it may not be shorter than 0.5 s under any circumstances. The test field is applied to all sides of the lux metre’s covering.
In this test, the lux metre must demonstrate normal functioning within the limits of the maximum permissible error pursuant to Article 2.3, or it must ascertain a fatal error and react to it by the means defined.
