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ASTM D7928-16e1 - Standard Test Method for Particle-Size Distribution (Gradation) of Fine-Grained Soils Using the Sedimentation (Hydrometer) Analysis
May 1, 2016 - ASTM International

1.1 This test method covers the quantitative determination of the distribution of particle sizes of the fine-grained portion of soils. The sedimentation or hydrometer method is used to determine the particle-size distribution (gradation) of the material that is finer than the No. 200 (75-µm)...

Thermography Enhances the Capabilities of Laser Transmission Welding (.pdf)
FLIR

In order to investigate the weldability of plastics, a thermographic system based on an FPA detector at 7.5 to 13 µm is realized. Using this technique, the influence of different material modifications and laser irradiation parameters on the heating behavior of selected thermoplastics is...

Types of Diodes, Their Characteristics and Applications
December 17, 2015 - IEEE GlobalSpec

A semiconductor diode is a non-linear device whose most outstanding feature is the fact that, basically, current is only allowed to flow in one direction. The diode is built by joining together two semiconductor materials: an N-type material (rich in negative carriers or free electrons) and a...

ASTM D6820-18 - Standard Guide for Use of the Time Domain Electromagnetic Method for Subsurface Site Characterization
February 1, 2018 - ASTM International

1.1 Purpose and Application: 1.1.1 This guide summarizes the equipment, field procedures, and interpretation methods for the assessment of subsurface materials and their pore fluids using the Time Domain Electromagnetic (TDEM) method. This method is also known as the Transient...

ASTM C1863-18 - Standard Test Method for Hoop Tensile Strength of Continuous Fiber-Reinforced Advanced Ceramic Composite Tubular Test Specimens at Ambient Temperature Using Direct Pressurization
January 1, 2018 - ASTM International

5.1 This test method (also known as "tube burst test") may be used for material development, material comparison, material screening, material down selection, and quality assurance. This test method can also be used for material characterization, design data generation,...

ASTM E2535-07(2013) - Standard Guide for Handling Unbound Engineered Nanoscale Particles in Occupational Settings
September 1, 2013 - ASTM International

5.1 This guide is intended for use by entities involved in the handling of UNP in occupational settings. This guide covers handling principles and techniques that may be applied, as appropriate, to the variety of UNP materials and handling settings. These settings include research and...

P1901.1.1/D0.7, Sept 2019 - IEEE Approved Draft Standard Test Procedures for IEEE 1901.1 Standard for Medium Frequency (less than 15 MHz) Power Line Communications for Smart Grid Applications
2020 Edition, June 11, 2020 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This Standard specifies the interoperability and compliance testing for IEEE 1901.1, in which Physical (PHY) and media access control (MAC) layers of the medium frequency band (less than 12 MHz) broadband power line communication technology for smart grid applications(SGPLC) based on...

P1937.1/D6.0, May 2020 - IEEE Draft Standard Interface Requirements and Performance Characteristics for Payload Devices in Drones
2020 Edition, May 19, 2020 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

IEEE 1937.1 standard presents the general interface requirements and performance characteristics of payload devices in drones. Chapater1 and chapter2 are the overview and normative references of the standard. In chapter 3, there are a few definitions including drones, payload and payload interface...

PC62.11/D9.0, Feb 2020 - IEEE Approved Draft Standard for Metal-Oxide Surge Arresters for AC Power Circuits (> 1 kV)
2020 Edition, May 8, 2020 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Metal-oxide surge arresters (MOSAs) designed to repeatedly limit the voltage surges on 48 Hz to 62 Hz power circuits (>1000 V) by passing surge discharge current and automatically limiting the flow of system power current are addressed in this standard. This standard applies to...

ASTM D3741-00(2020) - Standard Test Methods for Appearance of Admixtures Containing Halogenated Organic Solvents
April 1, 2020 - ASTM International

1.1 These test methods cover the visual determination of the physical appearance of admixtures containing halogenated hydrocarbons. These test methods are qualitative test methods. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this...

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