When accuracy really counts, you should make four-wire resistance measurements. Sometimes referred to as the Kelvin method, the four-wire resistance method is often used in automated test applications where long cable lengths, numerous connections, or switches exist between the digital multimeter (DMM) and the device under test (DUT).
While today’s power supplies provide many advanced features, finding them and maximizing their capabilities can be challenging. That’s why when AMETEK Programmable Power designed the Sorensen™ SGX Series programmable DC power supplies, we paid a lot of attention to the user interface. The result? The SGX Series has an intuitive, easy-to-use front panel touchscreen display that allows you to quickly access output programming parameters, measurements, sequencing, and configuration and system settings.
One feature that makes the California Instruments™ Asterion® AC Series power sources an ideal choice for sophisticated test applications is their ability to manage test waveforms. In addition to providing the three standard waveforms — sine wave, square wave, and clipped sine wave — the Asterion AC Series has an arbitrary waveform generator that allows you to create up to 200 different custom waveforms and download them into the power source memory.
Testing that requires the use of strain gages often consume large amounts of resources and effort to prepare for. One way to reduce the amount of time and energy spent configuring a test is to use sensors that support the Transducer Electronic Data Sheet (TEDS) interface. Many VTI measurement instruments support TEDS sensors including the EX1629 48-channel high-performance strain gage measurement instrument, EX1403 16-channel bridge/strain gage instrument, and the RX1024 24-channel bridge/strain gage instrument.
One of the cool features of AMETEK Programmable Power's SGX Series of power supplies is that it supports an LXI Class C Ethernet interface. This allows you to connect the SGX Series to your network and control it remotely from any computer on the network.
Although thermocouples are the most commonly used temperature sensor in test applications, a close second is the resistance-temperature detector, or RTD. RTDs operate on the principle that the resistivity of a metal is proportional to its temperature. The higher the temperature, the higher the resistivity.
For many test applications, measuring the temperature is a necessity. For example, when testing an aircraft engine, you may need to measure manifold temperature or the exhaust gas temperature. To help you take those measurements, VTI Instruments offers a number of options, including the EX1000A series of precision voltage measurement instruments and the RX1032 rugged thermocouple measurement system.
Thermocouples are arguably the most common type of temperature sensor, although you can also use resistance temperature detectors (RTDs), or thermistors. The EX1000A series supports all three types of sensors, while the RX1032 supports only thermocouples.
Resistive loads are easy on a DC power supply. When you turn off the power, the current quickly drops to zero and no damage is done.