HBM's RM4220 is a strain gage amplifier. Because it simply snaps on to standardized support rails, the RM 4220 amplifier is easy to install. A service-friendly snap-in terminal block is used to make the electrical connection. Individual strain gage transducers as well as several strain gages connected in parallel (>80 Ohms) can be connected to the measuring amplifier.
This amplifier offers a very simple and practical calibration of the zero point and the final value by using DIP– switches and potentiometer. The excitation voltage is selectable with 5 or 10 V. The output signal is 0/10 V or +/- 10V and 4/20 mA.
The connection of the transducer is either possible in 4– or 6–wire technique. If you use the 6–wire technique, you can neglect the effects on resistance variation of the extension wire. The housing made of polyamide PA type PHOENIX EM can be hooked up with every DIN EN support rail (EN 50022 standard).
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HBM – Products and services from virtual to physical testing
For over 60 years, the name HBM stands for reliability, precision and innovation all over the world. The company is the technology and market leader and offers products and services for an extensive range of measurement applications in many industries. Users worldwide rely on the perfectly matched components of the complete measurement chain that guarantees maximum accuracy of measurement results and enables optimization of the complete product life cycle: from the development through the testing stage as well as in manufacturing and production.
HBM's product range covers sensors, transducers, strain gages, amplifiers and data acquisition systems as well as software for structural durability investigations, tests and analysis. The potential fields of application can be found in every branch of engineering and industry from virtual through physical test and measurement.
HBM has 27 subsidiaries and sales offices in Europe, America and Asia. HBM also has representatives in another 40 countries around the world. In addition to headquarters in Darmstadt (Germany), other HBM production facilities are located in Marlborough (USA) and Suzhou (China).
HBM has been the first company in Germany to be certified per ISO9001. In 1996, HBM's environmental management system was certified per ISO14001.
HBM is a wholly-owned subsidiary of Spectris plc, a group specialized in precision instrumentation and electronic controls.