OAR 333-112-0020
Measurement and Test Procedures
(1)
Leakage levels shall be determined by measurements of microwave power density made with an instrument system which:(a)
Reaches 90 percent of its steady-state reading within three seconds when the system is subjected to a stepped input signal;(b)
Has a radiation detector with an effective aperture of 25 square centimeters or less as measured in a plane wave, having no dimension exceeding ten centimeters;(c)
Is capable of measuring microwave oven leakage levels with an accuracy of plus 25 percent and minus 20 percent (plus or minus one decibel);(d)
Has been calibrated at least within the last 12 months.(2)
Measurements shall be made in accordance with the manufacturer’s leakage test procedures or with the microwave oven operating at its maximum output and containing a load of 275 plus or minus 15 milliliters of tap water, initially at room temperature, placed within the cavity at the center of the load-carrying surface provided by the manufacturer. The water container for the latter procedure shall be a low form 600 milliliter beaker, or substantially similar vessel, having an inside diameter of approximately 8.5 centimeters and made of an electrically nonconductive material, such as glass or plastic.(3)
Measurements shall be made with the door fully closed, as well as with the door fixed in any other position which allows the oven to operate.(4)
Measurements shall be made at points five centimeters or less from external surfaces of the oven.
Source:
Rule 333-112-0020 — Measurement and Test Procedures, https://secure.sos.state.or.us/oard/view.action?ruleNumber=333-112-0020.