Test & Measurement

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.

Posted in: Articles, Test & Measurement, Capacitors, Electric power, Test equipment and instrumentation
Read More >>

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, Test & Measurement, Weather and climate, Evacuation and escape, Satellites
Read More >>

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, Test & Measurement, Measurements, Gas turbines, Test procedures
Read More >>

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, Manufacturing & Prototyping, Test & Measurement
Read More >>

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, Manufacturing & Prototyping, Test & Measurement
Read More >>

Ground Bond Testers

Slaughter Company (Lake Forest, IL) announced the 260 Series Ground Bond testers with an improved interface that eliminates menus and redundant button pushes. The interface allows manufacturers to set up and run Ground Bond tests in seconds. The Model 264 is a 6-kV Hipot tester, and the Model 266 is a 5-kV Hipot tester. The testers provide security settings that enable quick setup of permission levels. With five programmable memories and a rugged design, the testers are suited for production line applications. Optional USB interface provides a way for manufacturers to automate a production line.

For Free Info Visit http://info.hotims.com/61060-404

Posted in: Products, Manufacturing & Prototyping, Test & Measurement
Read More >>

Digital Multimeters

The U1280 and U1240C Series handheld digital multimeters from Keysight Technologies (Santa Rosa, CA) feature 60,000-count display resolution and 0.025 percent accuracy. The 4.5-digit handheld DMMs are suited for electronics manufacturing, installation, and maintenance work in the electronics test industry. The U1240C 4-digit DMMs come with 10,000-count display resolution and 0.09 percent accuracy, and provide a range of measurement functions. The U1240C comes with ZLOW and harmonic ratio. ZLOW provides low impedance mode to eliminate stray voltages. The harmonic ratio function gives an indication of the presence of harmonics. The DMMs are capable of withstanding up to a three-meter (ten-foot) drop. The U1240C is CAT IV 600 V and CAT III 1000 V compliant for electrical testing and measurement. Both series come with extended battery life — 800 hours for the U1280 Series and 400 hours for the U1240C.

For Free Info Visit http://info.hotims.com/61060-402

Posted in: Products, Manufacturing & Prototyping, Test & Measurement
Read More >>

Multi-Function Instrument

National Instruments (Austin, TX) introduced a high-performance model of the software-based VirtualBench all-in-one instrument that combines a mixed-signal oscilloscope, function generator, digital multimeter, programmable DC power supply, and digital I/O. The new version offers 350 MHz of bandwidth, four analog channels, and Ethernet connectivity. The mixed-signal oscilloscope with protocol analysis delivers 350 MHz of bandwidth and four analog channels for higher-performance interactive test. The higher-wattage programmable DC power supply features up to 3 A for the 6 V output channel, and up to 1 A for the 25 V and -25 V channels for higher current applications. A unified view of all five instruments, visualization on larger displays, and functionality to save data and screenshots are provided.

For Free Info Visit http://info.hotims.com/61060-403

Posted in: Products, Manufacturing & Prototyping, Test & Measurement
Read More >>

Strain Gauge Monitors

Bristol Instruments (Boston, MA) introduced the OM502T Series of monitors for strain gauge sensors. The 5-digit instruments are programmable for mathematical functions, including peak and tare, as well as digital filters. The monitors are available with 0.56- inch-tall red or green LED displays, depending on the model. Accuracy is to 0.05% of range, and rate is up to 100 measurements/sec. Up to four relay outputs are available, and can be turned on or off at preset load values. Analog outputs are 0 to 2/5/10 V, ±10 V; 0 to 5 mA; and 0/4 to 20 mA. Digital output interfaces include RS-232 and RS-485 — both isolated — with MODBUS and PROFIBUS protocols. The monitors offer fixed and adjustable excitation options. between 10 to 30 V AC/DC, 80 to 250 V AC/DC.

For Free Info Visit http://info.hotims.com/61060-406

Posted in: Products, Manufacturing & Prototyping, Test & Measurement
Read More >>

Shaft Voltage Tester

The AEGIS® CAT II/III Shaft Voltage Tester™ digital oscilloscope from Electro Static Technology (Mechanic Falls, ME) enables testing of industrial motors controlled by variable frequency drives (VFDs). The tester is designed and configured to take and capture voltage measurements from the spinning shafts of motors. The digital oscilloscope comes with a conductive microfiber-tipped probe, a probe holder with magnetic base, and a carrying case. The 2-channel, full-function, 100-MHz oscilloscope has a 5.7" TFT LCD color display, a multi-language user interface, and a 5-hour rechargeable/replaceable lithium-ion battery pack. The oscilloscope is capable of sampling rates of 1 GSa/s to 50 GSa/s, and has a USB port for data transfer or flash drive storage.

Posted in: Products, Manufacturing & Prototyping, Test & Measurement
Read More >>

The U.S. Government does not endorse any commercial product, process, or activity identified on this web site.