EMC Emissions: We measure the amount of electromagnetic energy emanating from your product. This energy can be emitted from the unit itself, from the AC mains cable or any signal cables that may be attached in normal operation.
EMC Immunity: The purpose of EMC Immunity testing is to ensure that the product will function correctly in the presence of electromagnetic interference (EMI).
The product will be subjected to a range of different types of EMI and the behaviour of the product needs to be monitored in order to confirm that it is operating as intended. In order that we can assess the product performance, we need to have information about the fundamental purpose of the product and the functions that it performs.
The actual product specification forms a critical part of the performance assessment and it is important to quantify any degradation that may occur under duress.
The following paragraph is quoted from the generic EMC compliance standard EN 61000-6-1:2007 and gives an indication of the information required:
A functional description and a definition of performance criteria, during or as a consequence of the EMC testing, shall be provided by the manufacturer and noted in the test report. Please complete the Equipment Under Test Critical Information table below.
Performance Criterion A: The apparatus shall continue to operate as intended during and after the test. No degradation of performance or loss of function is allowed below a level specified by the manufacturer, when the apparatus is used as intended. The performance level may be replaced by a permissible loss of performance. If the minimum performance level or the permissible performance loss is not specified by the manufacturer, either of these may be derived from the product description and documentation and what the user may reasonably expect form the apparatus if used as intended.
Enclosure tests:
Immunity to Power Frequency Magnetic Field
Immunity to Radio Frequency Electromagnetic Field AM
Signal Port tests:
Radio Frequency Common Mode
DC Power Port Tests:
Radio Frequency Common Mode
AC Power Ports Tests:
Radio Frequency Common Mode
Performance Criterion B: The apparatus shall continue to operate as intended after the test. No degradation of performance or loss of function is allowed below a level specified by the manufacturer, when the apparatus is used as intended. The performance level may be replaced by a permissible loss of performance. During the test degradation of performance is however allowed. No change of actual operating state or stored data is allowed. If the minimum performance level or the permissible performance loss is not specified by the manufacturer, either of these may be derived from the product description and documentation and what the user may reasonably expect form the apparatus if used as intended.
Enclosure tests:
Electrostatic Discharge
Signal Port tests:
Fast Transients
Surges
DC Power Port Tests:
Fast Transients
Surges
AC Power Ports Tests:
Voltage Dips
Fast Transients
Surges
Performance Criterion C: Temporary loss of function is allowed, provided the function is self-recoverable or can be restored by the operation of the controls. AC Power Ports Tests: Voltage Dips Voltage Interruptions