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NASA Measures Raindrop Sizes from Space

For the first time, scientists have three-dimensional snapshots of raindrops and snowflakes around the world, thanks to the joint NASA and Japan Aerospace Exploration Agency Global Precipitation Measurement (GPM) mission. With the new global data on raindrop and snowflake sizes, scientists can improve rainfall estimates from satellite data and numerical weather forecast models.

Posted in: News, Measuring Instruments, Monitoring

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Advanced Capabilities of PXI-Based Semiconductor Test Systems

The ongoing challenge for today’s semiconductor test engineers is to identify and create new test solutions that can offer significantly lower test costs as well as address the need for configurable, open-architecture, flexible test solutions that can provide comparable features to proprietary ATE platforms. In particular, for test requirements with low to moderate volumes — such as pilot production, verification, and focused production test applications — the need for flexible and cost-effective ATE solutions is particularly acute. For these applications, test engineers historically have relied upon legacy test systems that have a low acquisition cost, but high operating costs or in-house designed rack-and-stack solutions. However, semiconductor test system solutions based on the PXI platform have made significant advancements in functionality and performance over the past three or four years, offering test engineers a viable alternative for both current and future test needs.

Posted in: Articles

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Calibration Requirements for Testing Coupling-Decoupling Networks

Coupling-Decoupling Networks (CDNs) are the unglamorous workhorses that get “hitched up” to an impulse generator in order to perform impulse testing on powered equipment. As such, performance and calibration requirements for CDNs have not been specified to the same level of detail as the impulse generator. This is no longer the case with the Third Edition of IEC 61000-4-5, the international standard for surge immunity testing.

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NASA Monitoring Technologies Shake Up Earthquake Prediction

The seconds to minutes of advance warning of an earthquake can allow people and systems to take actions to protect life and property from destructive shaking. Earthquake early warning systems use earthquake science and the technology of monitoring systems to alert devices and people when shaking waves generated by an earthquake are expected to arrive at their location. NASA has been one of the agencies at the forefront of earthquake early warning technology for many years, and new monitoring techniques developed by NASA are shaking up the way earthquakes are predicted.

Posted in: Articles

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Reducing Torque Measurement Uncertainty in Turbine Engine Testing

Torque is among the most important of all the measured quantities in applications ranging from characterizing high-power gas turbines, to determining the level of force required to open a screw cap on a medication container. As anyone who studied physics in high school should recall, torque is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Loosely speaking, torque is a measure of the turning force on an object such as a bolt or a flywheel. For example, pushing or pulling the handle of a wrench connected to a nut or bolt produces a torque (turning force) that loosens or tightens the nut or bolt. However, measuring torque accurately can be far from straightforward. This article offers an overview of one approach to reducing uncertainty in torque measurement using an example of turbine engine testing to illustrate the process.

Posted in: Application Briefs

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Flow Meters

AutomationDirect (Cumming, GA) offers ProSense FMM Series magnetic-inductive flow meters (magmeters) for liquid flow monitoring in industrial processes. The magmeters, available with 1/2" to 2" NPT female process connections, are designed with a 4-digit numeric display with pushbutton setup, a 4-pin M12 quick disconnect, and two outputs. The stainless steel design mounts directly in-line.

Posted in: Products

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Pulsed Test Instrument

Instruments for Industry, a unit of AMETEK Compliance Test Solutions (Edison, NJ) introduced the S21-4KWP-2KWP FLEX solid-state micro wave pulse power amplifier with a frequency range of 1.0 GHz to 2.0 GHz. It supplies 4 kW of pulse power up to 10% duty cycle with a maximum pulse width of 100 uS. The amplifier can be configured into two separate 2-kW pulse amplifiers for lower-power requirements at multiple locations. Safety features include RF and hardware protection circuits such as voltage standing wave ratio (VSWR), over current, voltage protection, and redundant thermal and airflow sensors for the module and full system. The user interface features a backlit screen that shows forward/reverse power indication, system status, and self-diagnostic information. For Free Info Visit http://info.hotims.com/61060-401

Posted in: Products

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