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Procedures for Field Testing Microwave Ovens

FinalCenter for Devices and Radiological Health08/01/1977

Description

This manual sets forth guidance and procedures for field testing microwave ovens for compliance with the microwave emission and safety interlock operation requirements of the Federal radiation safety performance standard. It presents background  material and  complete instructions for carrying out the necessary tests and also describes procedures for completing form FD 2536, "Microwave Oven Field Test Record," which is used to report the data to the Bureau of Radiological Health. It has been prepared to provide a detailed reference document that will be particularly useful to FDA, State, and local radiation control personnel responsible for the field testing of microwave ovens.

Scope & Applicability

Product Classes

4
Microwave Ovens

The specific product category subject to this guidance.

Microwave Oven

product listed under 21 CFR 1002.61; compliance survey instruments for microwave ovens; Compliance survey instruments for microwave oven compliance; The subject of the compliance survey instruments being calibrated.; Compliance survey instruments for microwave ovens.

Prestandard Oven

Ovens produced prior to the effective date and not certified.; Ovens manufactured before the performance standard was effective

Poststandard Oven

Ovens required to meet the standard and have certification labels.

Stakeholders

5
State and local radiation control personnel

Personnel who perform testing programs for enforcement of the performance standard.

RRHR

Regional Radiological Health Representative

Surveyor

ensure that the function of all controls are clearly understood by the surveyor.

Regional Radiological Health Representative

Provides decoding information for manufacture dates and model lists.

Manufacturer

Entity responsible for submitting NDINs

Regulatory Context

Attributes

6
Date of Manufacture

Specific topic of importance for diagnostic x-ray equipment.; Required on identification labels in Month and Year format.; Determines which performance standards are applicable; required on identification labels

Response Time

change the response time in the Slow position to the 3 seconds allowed by the standard

915 MHz

Operating frequency for specific General Electric combination ranges.; Unless testing an oven known to operate at 915 MHz

2450 MHz

wavelength of the microwave frequencies involved; Standard microwave frequency for household ovens; Operating frequency for virtually all microwave ovens.; frequency selector switch should always be set to 2450

Post-standard ovens

applies to all ovens manufactured on or after October 6, 1971

Prestandard ovens

ovens manufactured before the effective date of the standard; All prestandard ovens provide only continuous power.

Identified Hazards

Hazards

8
Nonionizing radiations

The Bureau conducts programs to limit exposure to ionizing and nonionizing radiations.

Electromagnetic Interference

risks due to strong emissions from the MR system

Excessive Leakage

Microwave emission above the specified limits

Self-exposure to excessive levels of microwave energy

minimize the possibility of probe damage or self-exposure to excessive levels of microwave energy.

Magnetron Burnout

Risk if ovens are operated without a load.

Microwave Emission

Radiation leakage that must be monitored and controlled for safety.; Potential leakage or bursts of energy during door opening.; The specific tests to be performed on microwave ovens are closed-door leakage, door-opening leakage, and failed interlock.

Microwave energy leakage

door must be designed to prevent the escape of the microwave energy

Overheating

result in oven damage, e.g., due to overheating of the magnetron

Related CFR Sections (1)

See Also (6)