EMC Compliance Testing

Please fill out the form at the right side of this page with all the requested information about the product being submitted for test. This documentation helps us form a test plan, and to create a quote to your requirements. Missing or inaccurate information may result in an inaccurate quotation.
If full EMC is not required, and you are looking for pre-compliance testing or development testing, please give us as much information as you have in the form, and specify your special requirements in the Notes section.

Tell Us More

Please give us as much information about your product as you can. 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 what the product is
  • A detailed description of product function and internal operation
  • Product configuration & setup 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 in the Other Information section of the form if this is required.

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. As supplied, the product must be in the “worst state” condition for emissions testing, that is all functions must be operating at their highest level to maximise any potential emissions.

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. We assess the product operation using performance criteria as described below.

Performance Criteria

Immunity is the ability of equipment to continue functioning correctly in the presence of electromagnetic interference.
Different types of applied interference can cause a range of product malfunctions. Typical examples of problems are as follows:

  • Loss or corruption of communications data
  • Excessive variation in analogue measurements beyond product specifications
  • Phantom input signals
  • Inadvertent change of product state
  • Loss of processor function
  • Loss of display function
  • Inadvertent triggering of alarms
  • Loss of configuration data or spontaneous changes of settings
  • System reset
  • Damage to I/O ports or loss of function
  • Catastrophic failure of critical components

Some tests use continuous waves & others will involve pulses & spikes, depending on the specific test we are performing.

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.

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 CThe unit must function after the test is complete. Standard operator intervention is permitted.

Our Requirements

All equipment supplied for test must be in a running condition exercising all normal functions as it would be in service with the end customer, 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. While under test the equipment must run in it’s usual manner automatically. Equipment that is normally single-shot in usual operation must be supplied with custom firmware to automate operation, preferably on a 1-second cycle, as manual operation during EMC testing is not usually feasible.
All power, communications & ancillary cables must be at least 5 metres in length to allow us to set up the equipment correctly in the test cell, regardless of the length in normal operation.

Upload options are given for photos & product documentation. The documentation upload allows zipped files for convenience.

Please contact us if you require assistance with any aspect of filling in this form.