Getting a device EMC tested with us is easy! To start with, please download our EMC customer sheet and fill in the product specifications & Performance Criteria. This documentation helps us form a test plan, and to create a quote to your requirements.
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Please give us as much information about your product as you can in your message. Things such as:
- Communication Interfaces
- Length of all cables in service
- Power requirements (AC/DC, Mains/SELV)
- Indoor or outdoor use
- Any magnetically sensitive components (e.g. Hall effect sensors)
- Equipment installation environment
- Specific Directives or Standards applicable to your products
- A detailed description of product function and internal operation
- Product configuration diagrams if possible
In the event your product fails EMC testing, and you wish for us to assist in remedial action to get your product through testing, we will also require:
- Schematic diagrams & engineering drawings
We can also arrange a personal meeting to examine the equipment to be tested & discuss specific requirements for more complex EUTs. Please let us know with your message if this is required.
In the EMC customer sheet, there is a section regarding performance criteria of the product. When testing for immunity, which is the ability of equipment to continue functioning correctly in the presence of electromagnetic interference, some tests will use continous waves & others will involve very short bursts. Depending on the type of immunity to which you are testing, a wide range of tests are available. If testing to commercial standards for the EU, the product must comply with one of the following generalised performance criteria:
Performance Criterion A:
No degradation of performance or loss of function is allowed below a minimum performance level specified by the manufacturer, or what the user of the equipment would reasonably expect when the equipment is used as intended. (Criterion A means that the product performs normally and within specifications as defined in the user manual, both during and after the test).
Performance Criterion B:
No degradation of performance or loss of function is allowed, after the application of interference below a performance level specified by the manufacturer, or what the user of the equipment would reasonably expect when the equipment is used as intended. (Criterion B means that the product may have a temporary loss of function or degradation of performance during the test, but recovers to it’s normal operational state without operator intervention).
Performance Criterion C:
During and after the testing, a temporary loss of function is permitted, provided that the product function is self-recoverable, or can be restored to operational state using the controls normally available to the user, or a power cycle of the product by the user in accordance with the user manual. (Criterion C is very similar to Criterion B, with the exception that operator intervention is permitted to recover function).
For example, a measurement & logging device might have the following criteria specified by the manufacturer:
|Criterion A|| |
Excessive variation (>10%) in measurement reading on LCD.
partial corruption of communications, or momentary dropped Ethernet frames.
excessive variation of readings sent via communications (>10%) are NOT permitted.
|Criterion B||Complete loss of measurement reading on LCD.|
Corruption of LCD, Corruption or loss of stored data/memory.
Complete loss of communications or any change of operation state is NOT permitted.
|Criterion C||The unit must function after the test is complete. Standard operator intervention is permitted.|
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.
All equipment supplied for test must be in a running condition as it would be in normal service, with a way to monitor continued operation during testing. If software or an external PC is required to operate or test the equipment, this must be supplied by the customer. All equipment test modes must be automated, as manual operation during EMC testing is usually not feasable.
All communications & ancilliary cables must be at least 5 metres in length to allow us to set up the equipment correctly in the test cell.
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.
Once all the required information has been gathered together, please send us a message using the form below. Upload options are given for your completed EMC Customer Sheet, along with any other documentation for the product you wish to be tested. The Product Documentation upload allows zipped files for convenience.