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Japan EMC VCCI V-4 Testing

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

From concept through compliance, Keystone meets all of our customers’ needs under one roof. Keystone Compliance’s accurate test reports are delivered quickly using our “four-eyes” approach. Meaning that multiple engineers and technicians review each report, ensuring that all the information required is present. Additionally, we are in constant communication throughout the entire test process. Keystone’s EMC testing engineers streamline the process and assist companies to achieve the compliance they require.

Request a quote to receive expert VCCI testing services tailored to your specific needs. Contact us to discuss your product and how we can assist you in achieving VCCI electromagnetic compatibility certifications.

Summary of VCCI Japanese EMC Compliance Testing

VCCI V-4 is intended to standardize the placement of equipment under test and operational requirements to enhance the reproducibility of the measurement. Detailed attention is placed on defining conditions close to actual use for the placement of EUT and handling of cables. Placement of the EUT and handling of cables are determined from two points of view. First, not to cause radio interference during normal use. Second, to enhance the reproducibility of the test.

The VCCI V-4 standard test method encompasses supplementary test conditions for equipment under test. VCCI consists of:

  • Information technology equipment
  • General measurement conditions
  • Visual display units
  • Printers
  • External storage devices
  • Associated equipment
  • Digital video projectors
  • Multifunction devices
  • Communication equipment
  • Modems
  • Key telephone systems

A system with several separate units must be configured to form a representative configuration. The number and mix of units included in VCCI must be representative of those used in a typical installation. Lastly, the rationale used for selecting units is stated in the test report.

Examples of typical configurations are:

  • Personal computer;
  • Keyboard connected to PS/2 port and mouse;
  • Either of a CRT display unit connected to an analog RGB port or LCD unit.
  • One or more typical peripheral equipment connected to COM A port such as a serial base mouse and data processing drive.
  • One or more typical peripheral equipment is connected to the USB port. Such as flash memory, hard disk, keyboard, etc.

If no device is available for installation on a prepared port, the cable provided by the manufacturer is connected. The length of the interface cable and method for terminating its open end as per the manufacturer’s specifications.

Keystone Compliance Provides Expert VCCI Japanese EMC Testing

In addition to VCCI V-4 testing, Keystone has a full scope of expertise including environmental and package testing such as cold chain, temperature, and ingress protection. Our team strives to give our customers more time and energy on product development instead of testing. Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling. 

If you are ready to start your EMC VCCI compliance testing, please request a quote. Have a question about VCCI V-4 or information technology equipment? Contact us or call (724) 657-9940 and we will determine the best course of action.


For more information on Japanese EMC-related standards, please follow: