Over the past 10-20 years, counterfeit electronic components have become a serious problem. Counterfeit components are parts that have somehow been misrepresented as to their origins or quality. Because counterfeit parts are often of lower quality than what are called “franchise” parts, they may represent a hazard if used in critical systems such as automobiles, aircraft of any kind, military equipment, or space vehicles.
Many accelerometers used for measuring vibration include a built-in preamplifier to transform the high impedance charge output of the piezoelectric sensor into a low impedance voltage signal, typically 100-300 ohms, that can be transmitted over longer distances. To power this preamplifier, many VTI Instruments products provide an interface that complies with the Integrated Electronics Piezo Electric, or IEPE standard. Using this standard interface ensures that you can connect sensors with an IEPE interface to a VTI instrument and get good results.
Designing equipment to be operated onboard Navy vessels is not like designing a consumer product that plugs into a three-prong wall socket. That being said, it’s important to know the characteristics of the on-board power source and test to make sure that equipment can reliably use that power.
Testing AC power sources, such as uninterruptible power supplies, can be a real challenge. These products are often tested with resistive load banks, but this approach does not simulate real-world conditions such as switching DC/AC converters found in many AC powered products.
A question that we often get is whether or not the IVI instrument drivers that we supply with our AMETEK VTI products are compatible with Linux. The reason for this question is that many users prefer to have complete control over the software of their test system. And as a result, prefer to use Linux over Windows as their test system’s operating system. For users of LXI instrumentation, the question becomes whether or not the IVI instrument driver that comes standard with their LXI hardware work in Linux.
First of all, it is important to note that there are two levels of IVI compliance: IVI-COM and IVI-C. IVI-C drivers are IVI drivers that that have a C application-programming interface (API). IVI-COM drivers are IVI drivers that have a COM API. COM is a Microsoft technology, and is an architecture that is heavily dependent on the Windows operating system. As a rule of thumb, therefore, IVI-COM drivers will not work on a Linux OS.
When performing functional tests, keeping test times as short as possible is often a critical requirement. Time is money, after all. One way to reduce test times is to reduce the latency in setting up signal switch paths, stimulus devices, and measurements. These can all have a significant impact on the overall time it takes to complete a full functional test of a particular DUT.
Manufacturing and test environments can be very demanding, and most manufacturers need test equipment that is both accurate and reliable to meet increasing product throughput demands. To meet these demands, AMETEK Programmable Power has introduced the VTI EX1403 16-channel bridge and strain gauge instrument. The EX1403 sets the standard for stress and fatigue testing, delivering the highest performance measurements possible while keeping overall test hardware costs low and maximizing system uptime.
Topics: Compliance Testing
Calibration is not an option. While today's instruments are more accurate and drift less than previous generations, you still need to periodically check and calibrate your equipment. The way you do this, however, is changing.
In the past, manufacturers would recommend calibration intervals. A digital multimeter manufacturer might, for example, recommend that you calibrate the instrument once a year. When that year was up, you sent the DMM to your company's cal lab or to a third party.
That paradigm is changing. The current trend in metrology is not to blindly follow a manufacturer’s stated calibration interval, but to determine your own interval based on how much each instrument drifts over time and how much risk you're willing to take.
AMETEK Programmable Power, the global leader in programmable AC and DC power test solutions, will be exhibiting at APEC 2019, which takes place this year from March 17 – 21 in Anaheim, CA at the Anaheim Convention Center. At our booth (#1265), you can discuss your power problems with our engineers and get a hands-on demo of our products, including:
- Asterion® Series. The California Instruments™ Asterion® power sources feature sophisticated technology for delivering high performance, programmable AC and DC power. The sleek design packs maximum power density into a low-profile form factor with an intuitive touch screen interface that places that power at your fingertips. Centralized control and unparalleled modularity make Asterion the most adaptable platform on the market and sets the standard for affordable, precision power sources.Specifically on display will be:
We have just added two new higher-power models to our Asterion™ line of AC power sources:
- The Asterion 4503 supplies AC and DC output power up to 4,500 VA or 4,500 W;
- The Asterion 6003 supplies up to 6,000 VA or 6,000 W.
Both units come in a 4U chassis, and can supply single or three phase output power. Like the other models in our Asterion series, the 4503 and 6003 offer a compelling combination of intelligence, performance, and modularity that make them the most adaptable and affordable platform available today. These features include:
- AMETEK’s iX2™ current-doubling technology. With iX2, as the output voltage decreases from the maximum value to one-half the maximum value, the available output current increases up to two times the rated output current. This allows Asterion to maintain maximum power through the widest range of voltages. iX2 current-doubling technology eliminates the need to buy multiple sources or overpowered sources to run tests at different voltage levels, such as when performing low line voltage testing.
- AC and DC output voltage ranges up to 400 Vac and 500 Vdc. Load and line regulation are +/-0.025% and +/-0.015%, respectively. This makes the Asterion more versatile and accurate than most other AC power sources available today.