IEC 61101-1991 PDF

Full title and description

The absolute calibration of hydrophones using the planar scanning technique in the frequency range 0.5 MHz to 15 MHz (IEC 61101:1991). This international standard defines a method for the absolute sensitivity calibration of hydrophone receivers using a planar scanning measurement technique and includes measurement procedures, corrections and uncertainty considerations for ultrasonic hydrophone calibration.

Abstract

IEC 61101:1991 specifies a procedure for absolute calibration of hydrophones based on planar scanning over the frequency range 0.5 MHz to 15 MHz. The standard describes determination of hydrophone sensitivity, experimental setups (power measurement, transducer mounting and measurement conditions), and the corrections and uncertainty contributors needed to report an absolute sensitivity value for hydrophones used in ultrasonic field measurements.

General information

• Status: Superseded / Withdrawn (replaced by the IEC 62127 series).
• Publication date: 20 December 1991 (Edition 1.0).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 17.140.50 (Ultrasonics).
• Edition / version: Edition 1.0 (1991).
• Number of pages: 46 pages (typical published PDF/printed count).

Scope

IEC 61101 defines a method for the absolute calibration of hydrophones using the planar scanning technique and applies to hydrophones used to measure ultrasonic fields in the frequency range 0.5 MHz to 15 MHz. The standard covers the determination of hydrophone sensitivity, required measurement conditions and setup, data-processing (integration and corrections) and sources of uncertainty relevant to absolute calibration by planar scans.

Key topics and requirements

• Principles of absolute hydrophone calibration using planar scanning (frequency range 0.5–15 MHz).
• Definitions and list of symbols used for hydrophone calibration and field measurements.
• Determination of hydrophone sensitivity (end‑of‑cable sensitivity and related measures).
• Measurement procedure: power measurement, transducer mounting, measurement conditions and practical measurement steps.
• Corrections and uncertainty sources: total power, received hydrophone signal corrections, integration methods, directional response, finite hydrophone size, noise, non‑linear propagation, and planar‑scan specific corrections.
• Informative annexes with additional data, examples and bibliographic references to support measurement practice.

Typical use and users

This standard is intended for national and industrial calibration laboratories, manufacturers of hydrophones and ultrasonic transducers, medical‑ultrasound measurement laboratories, research institutions and standards bodies that require an established method for absolute hydrophone calibration. It is used to produce traceable sensitivity data for hydrophones that will be used in ultrasonic field characterisation and dosimetry.

Related standards

IEC 61101:1991 has been superseded by the IEC 62127 series (notably IEC 62127-1, -2 and -3 published in 2007 with later amendments) which extends and reorganises hydrophone measurement and calibration requirements for medical ultrasonic fields up to higher frequencies. National/adopted equivalents include EN/BS/UNE variants of EN/IEC 61101 published in the 1990s; later EN editions were replaced by the EN versions of the IEC 62127 series.

Keywords

hydrophone, calibration, absolute calibration, planar scanning, ultrasonic hydrophone, ultrasound metrology, sensitivity measurement, measurement uncertainty, ultrasonic fields, medical ultrasound.

FAQ

Q: What is this standard?

A: IEC 61101:1991 is an international standard specifying a method for the absolute calibration of hydrophones using a planar scanning technique for the frequency range 0.5 MHz to 15 MHz.

Q: What does it cover?

A: It covers definitions, measurement procedures (power measurement, transducer mounting and measurement conditions), determination of hydrophone sensitivity, required corrections and a detailed discussion of sources of uncertainty relevant to planar‑scan absolute calibration.

Q: Who typically uses it?

A: Calibration and test laboratories, hydrophone and ultrasound transducer manufacturers, medical‑ultrasound test facilities, metrology institutes and researchers working on ultrasonic field measurement and dosimetry.

Q: Is it current or superseded?

A: IEC 61101:1991 is superseded. The IEC withdrew it (withdrawal date recorded as 23 August 2007) and replaced its content with the IEC 62127 series (parts 1–3, 2007 and subsequent amendments). For current calibration practice and requirements refer to IEC 62127‑1/‑2/‑3 and their amendments.

Q: Is it part of a series?

A: IEC 61101 itself is a standalone document from 1991, but its subject matter has been absorbed into the later IEC 62127 series (Ultrasonics — Hydrophones), which provides a multi‑part, expanded framework for hydrophone measurement and calibration up to higher frequencies and with updated methods.

Q: What are the key keywords?

A: Hydrophone calibration, planar scanning, absolute calibration, ultrasonic field measurement, sensitivity, measurement uncertainty, medical ultrasound.