Archives by date
You are browsing the site archives by date.
Switch circuit of the equipment switching power supply: the interference source frequency is from tens of kHz to hundreds of kHz, the ultra harmonics can reach to tens of MHz. Rectifier circuit of the equipment dc power source: the power frequency rectifier noise frequency can reach to hundreds of kHz; the ultra harmonics can reach […]
Flashing Effect of the Light Source and the Measuring Method|Part5: Flashing Results of the Typical Light Source
In the experiment, we use the photometer to measure the changing wave of the luminous flux for the four types of typical light source including the 26W screw-type electronic energy saving lamp, 60W ordinary tube fluorescent lamp, 60W ordinary lamp and single red LED, and calculate the fluctuation depth. We set the sampling interval is […]
For the common EMC problem, we usually take the following corrective measures which can solve the most of the problems: We can coat the conducting resin on the mating face of the shields, or add the conductive gasket on the mating face, even use the conductive metal rubber for the remedy. The conductive gasket can […]
Knowledge About EMC (Electromagnetic Compatibility) Testing|Part1: When EMC Rectification and Countermeasures Are Needed?
For the electronic and electricical products, electromagnetic compatibility should be considered during the design stage, which can reduce the possibility of the EMC problem caused in the production stage to a lower degree. Whether it meets the requirement, it finally depends on the EMC inspection test of EMC conformance. Due to EMC complexity, even for […]
In this experiment, we use PR-110B transient photometer to measure the luminous flux of all kinds of light source, and calculate the fluctuation depth to compare the flash intensity of all kinds of light source. PR-110B transient photometer can scale luminous flux by user self. its major performance and technical figures as following: 1. Light current measuring range: 0.005×10-7A~2000×10-7A; measuring […]
The third version of IEC 60601-1 stipulates that when conducting the energy measurement test, the operator should do two tests. Doing the first test when the measured equipment and the surge generator are disconnected, doing the second test when the measured equipment (DUT) and the surge generator are connected. If all the two times energy […]