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MIL-STD-461 EMC CS109 Conducted Susceptibility Testing

As a leader in EMC regulatory compliance testing, Keystone Compliance assists electronic equipment manufacturers with MIL-STD 461 EMC testing. Meeting the IEC, EN, and other MIL-STD-461 testing requirements can be challenging. Not only do we understand the challenges, but we help guide companies through the process. 

Keystone takes pride in providing the peace of mind that all of your MIL-STD-461 testing needs will be met. Our MIL-STD-461 test engineers work with clients to quickly develop appropriate and concise test plans. Additionally, we are in constant communication throughout the entire test process. We tailor each test plan to individual customer needs minimizing unnecessary costs and over-testing. 

Request a quote to receive expert MIL-461 testing services tailored to your specific needs. Ready to get started on your EMC compliance lab testing? We are. Contact us to see why so many companies work with us to achieve their EMC testing needs. 

Summary of MIL-STD 461 Compliance EMC Testing

This conducted susceptibility/immunity electromagnetic compatibility (EMC) test is applicable from 60 Hz to 100 kHz. The EMC test is carried out for equipment and subsystems. These subsystems and EMC equipment must have an operating frequency of 100 kHz or less. They must also have an operating sensitivity of 1 μV or better. Handheld equipment is exempt from this requirement.

The EMC equipment under testing (EUT) must not show any signs of degradation. The EUT must not show signs of malfunction or deviation from specified indications. These indications are beyond the tolerances indicated in the individual equipment or subsystem specification.

Lastly, this MIL-STD 461 EMC test procedure is used to verify the ability of the equipment under testing to withstand structure currents.

Scope of MIL-461 Standard Electromagnetic Compatibility EMC Device Testing

The EMC and conducted immunity 461-test is set up as follows:

  • Configure the EUT and the test equipment to establish a single-point ground for the test setup using the EUT ground terminal. Using isolation transformers, all AC power sources are isolated. The safety ground leads of all input power cables are disconnected.
  • The EUT and the test equipment on non-conductive surfaces are placed to enable a single point ground to be established.
  • The test points for the injected currents are mostly mounted diagonally across all surfaces of the equipment. However, some other configurations may arise. This includes bulkhead mounted equipment. In which case, the currents are mounted diagonally across the rear surface of the equipment.
  • Another different configuration may include equipment that will not be rack mounted. The equipment is configured at diagonal extremes across only the mounting surface.
  • Lastly, the signal generator and resistor are connected. These two items are connected to a selected set of test points. The test points are by conductors that are perpendicular to the test surface. The length of these two points must at least be 50 centimeters long.

Data collected will include specific information such as:

  • A table is provided showing the mode of operation and susceptible frequency. Current threshold levels, current limit levels, and susceptible test points are also provided.
  • A diagram of the EUT showing the location of each test point is prepared.

Expert MIL-461 EMC CS109 Compliance Services

Keystone Compliance strives to give our customers more time and energy on product development instead of testing. Our professional EMC test engineers can accommodate fixed, mobile and portable devices of all sizes. Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling.

Complete our request a quote form to get a jump start on the conversation. Have a question about the MIL-STD-461 test method or our EMC testing lab? Contact us or call (724) 657-9940 and we will determine the best course of action.

For more information on general MIL-461 testing and test standards, please visit the links below: