What marking should be included for devices that tested the galvanic isolator?

The correct marking for devices that have tested the galvanic isolator is associated with an independent laboratory. An independent laboratory is a third-party entity that conducts tests and evaluations on products to ensure they meet specific standards without any potential bias. This designation is crucial because it assures consumers and regulatory bodies that the testing was done impartially and according to established protocols.

Using an independent laboratory's validation ensures that the results are credible and that the galvanic isolator has been thoroughly assessed for safety and functionality. This enhances consumer trust in the product while also complying with industry standards and regulations that often require third-party testing for electrical devices.

While calibration laboratories, verification agencies, and certification bodies play various roles in the testing and certification landscape, the term "independent laboratory" specifically highlights the need for unbiased testing, making it the most suitable choice for denoting the testing of galvanic isolators.