conducted emissions

Conducted Emission test, also known as harassment voltage test, will be involved as long as there are products with power cords, including many DC power supply products. In addition, signal/control lines also have conducted emission requirements in many standards , usually expressed by the limit of disturbance voltage or disturbance current (the two have a mutual conversion relationship), the insertion loss test (expressed directly in dB) also belongs to the conduction test category.

standard

Most European standards will be based on data from CISPR (Special Committee on Radio) and IEC (International Electrotechnical Commission) International Standard.

The test method is given by the relevant standard CISPR16-2 (GB6113.2)

Specific product standards:

CISPR11 - Industrial Science Medical Devices

CISPR14 - Household Appliances and Portable Tools

CISPR15- Lamps

CISPR22- Information Technology Equipment

EN61800- Motor Speed Control Equipment

EN12015- Elevator

Features and Frequency Range

Conduction through the cable

150 kHz to 30 MHz (some standards start at 9 kHz)

Test Equipment

a>Measuring receiver

EMI test receiver, compliant with CISPR16-1.

EMI receiver is also called Electromagnetic interference measuring instrument is the most widely used and most basic measuring instrument in electromagnetic compatibility testing.

R&S ESCI EMI test receiver

Most of the receivers used in the market are Rohde & Schwarz, Narda PMM series, Italian AFJ, Beijing Tesek (formerly Schaffner), and Agilent's have been used.

artificial power network

TESEQ LISN

Linear Impedance Stabilizing Network Compliant with CISPR16-1LISN Line Impedance Stabilizing Network

Isolate grid interference, provide stable test impedance, and play the role of filtering. There are many manufacturers of artificial power supply networks, most of which are used by Schwarzbeck, R&S, and TESEQ.

Voltage probe

Schwarzbeck voltage probe

If the rated current of the device is too large and there is no suitable LISN available, you can also directly use a voltage probe to measure the disturbance voltage at the power supply end. Manufacturers such as R&S, Schwarzbeck, Narda, etc.