ASTM E1324-21 PDF

Full title and description

ASTM E1324-21 — Standard Guide for Measuring Some Electronic Characteristics of Ultrasonic Testing Instruments. This guide describes recommended electronic measurement procedures for performance-related characteristics of sections of pulse-echo ultrasonic testing instruments, including power supplies, pulsers, receivers, time‑base circuitry, and gate/alarm systems.

Abstract

ASTM E1324-21 provides standardized procedures to measure electronic characteristics such as line regulation and battery behavior (power supply), pulse shape and amplitude (pulser), vertical linearity and frequency response (receiver), horizontal linearity and clock (time base), and gate delay/width, resolution and alarm functions (gate/alarm). The guide is intended to produce reproducible, performance‑related measurements from externally accessible test points without requiring access to internal circuitry and is complementary to Practice E317. It is primarily aimed at pulse‑echo flaw‑detection instruments operating in the nominal frequency range of 100 kHz to 25 MHz.

General information

• Status: Active.
• Publication date: June 1, 2021.
• Publisher: ASTM International.
• ICS / categories: 19.100 — Non‑destructive testing (Ultrasonic methods).
• Edition / version: E1324-21 (current 2021 edition).
• Number of pages: 11 pages (PDF/standard format).

Scope

The guide describes procedures for electronically measuring specific performance‑related characteristics of sections of ultrasonic testing instruments: power supply (line regulation, battery charge/discharge), pulser (pulse shape, amplitude, rise time, length, frequency spectrum), receiver (vertical linearity, frequency response, noise, sensitivity, dB controls), time base (horizontal linearity, clock/pulse repetition rate), and gate/alarm (delay, width, resolution, alarm level, gain uniformity, analog output, back‑echo gate). Measurements are taken from normally available connectors or test points so internal circuit access is not required. The guide complements Practice E317 and is not intended for production/inspection line evaluations. It is primarily written for pulse‑echo flaw detection instruments in the nominal 100 kHz–25 MHz range but may be applied to instruments with higher frequency components.

Key topics and requirements

• Measurement procedures for power supply characteristics: line regulation and battery charge/discharge behavior.
• Pulser measurements: pulse shape, amplitude, rise time, pulse length, and spectral content.
• Receiver measurements: vertical linearity, frequency response, noise floor, sensitivity, and dB control verification.
• Time base checks: horizontal linearity and pulse repetition/clock verification.
• Gate and alarm evaluation: delay and width accuracy, resolution, alarm thresholds, gain uniformity, analog outputs, and back‑echo gating.
• Use of commercially available electronic test equipment and external test points; no internal access required.
• Recommended reporting: tabular and graphical presentation of measured performance values for comparison and baseline tracking.

Typical use and users

Used by nondestructive testing (NDT) engineers, instrument manufacturers, calibration laboratories, quality assurance personnel, maintenance technicians, and research & development teams to verify, document, and compare electronic performance characteristics of ultrasonic pulse‑echo instruments. The guide supports acceptance testing, instrument characterization, periodic verification, and troubleshooting activities.

Related standards

Commonly used with or referenced alongside Practice E317 (evaluating ultrasonic instruments without electronic measurement instruments), E114 (ultrasonic pulse‑echo contact testing), E797/E797M (thickness measurement practice), and other ASTM standards covering ultrasonic testing methods and reference blocks. The guide also revises earlier editions of E1324 (for example, E1324‑16).

Keywords

ultrasonic testing, pulse‑echo, electronic measurement, pulser, receiver, time base, gate, alarm, line regulation, frequency response, vertical linearity, nondestructive testing (NDT), instrument characterization.

FAQ

Q: What is this standard?

A: ASTM E1324-21 is a guide that specifies procedures for measuring electronic performance characteristics of sections of ultrasonic pulse‑echo testing instruments (power supply, pulser, receiver, time base, gate/alarm).

Q: What does it cover?

A: It covers specific electronic tests (for example pulse shape, amplitude, rise time, frequency response, vertical linearity, gate delay and width, line regulation and battery behavior) and provides methods to report results in tabular or graphical form; measurements are made from external test points and are reproducible under the specified conditions.

Q: Who typically uses it?

A: NDT engineers, instrument manufacturers, calibration labs, QA/inspection personnel, and maintenance teams use it for instrument evaluation, acceptance testing, calibration verification, and troubleshooting.

Q: Is it current or superseded?

A: The 2021 edition (E1324‑21) is the current active edition and it revises previous editions (for example E1324‑16).

Q: Is it part of a series?

A: It is one of several ASTM standards and practices for ultrasonic and nondestructive testing; it is used alongside related documents such as Practice E317 and other ultrasonic method standards.

Q: What are the key keywords?

A: Ultrasonic testing, pulse‑echo, pulser, receiver, time base, gate/alarm, electronic characteristics, measurement, NDT.