IEEE 139-1952

IEEE 139-1952 is a superseded standard that sets out a recommended practice for measuring field intensity above 300 MC from radio frequency industrial, scientific, and medical equipment. It is relevant to engineers who need a consistent way to evaluate RF emissions in high-frequency environments where measurement method affects results. By defining how field intensity should be assessed, IEEE 139-1952 supports more reliable comparison, testing, and interpretation of equipment performance.

Overview of IEEE 139-1952

This document addresses measurement practice for field intensity in the frequency range above 300 MC, with clear relevance to RF industrial, scientific, and medical applications. As a recommended practice, IEEE 139-1952 is focused on method and consistency rather than product design alone. It helps establish a common technical basis for evaluating emitted fields, which is important when comparing equipment, reviewing test data, or documenting conformance in power, energy, and related engineering contexts.

Typical use cases

IEEE 139-1952 is typically used when assessing radio frequency field intensity from industrial or laboratory equipment operating above 300 MC. It may support test programs for RF heating systems, scientific instruments, and other devices that generate significant electromagnetic fields. The standard can also be useful in engineering workflows where measurement results must be repeatable across facilities, or where field data is needed to compare equipment behavior, support documentation, or inform installation and operating decisions.

Why it matters

Consistent field-intensity measurement is important because results can influence compliance reviews, equipment acceptance, and safety-related engineering decisions. IEEE 139-1952 helps reduce ambiguity in how measurements are taken and reported, which can improve comparability between tests and limit avoidable disputes in procurement or evaluation. For organizations dealing with RF industrial, scientific, and medical equipment, the standard provides a clearer technical reference for controlling measurement practice and managing performance risk.

• Recommended practice for field intensity measurement
• Applies above 300 MC RF equipment
• Relevant to industrial, scientific, and medical applications
• Superseded standard for technical reference and legacy use
• Supports repeatable test and evaluation methods