TEDS can measure reliably in just 18 seconds
A
HBM GmbH product story
Edited by the Engineeringtalk editorial team
Sep 8, 2009
HBM's Transducer Electronic Datasheet (TEDS) module can provide reliable measurement values in just 18 seconds.
The transducer simply needs to be connected to the amplifier.
The TEDS module includes an electronic data sheet that stores all relevant transducer data on a chip as standard
This is made possible by an electronic data sheet that stores all relevant transducer data on a chip as standard.
The amplifier reads the data and automatically makes the correct settings - and measurement with the correct units can start immediately without further user interaction.
This results in valuable time advantages and extra quality for test and measurement tasks in test-bench environments.
TEDS comes as standard with all the information required for its identification on a small memory chip (for example manufacturer number, transducer type, serial number, calibration date and measuring point).
Transducers without an integrated memory chip can also be easily upgraded with TEDS in the transducer cable or connector.
Modern measuring systems use a standard protocol to read the information saved on the chip for configuring the amplifiers.
The identified transducer automatically configures the measuring system and enables the measured value to be quickly forwarded to the visualisation or process level.
This provides users with substantial advantages: TEDS brings about a considerable gain of time and quality - especially with frequently changing test and measurement tasks in test-bench environments.
In addition, there is a marked increase in flexibility and protection against measurement errors.
Test-bench manufacturers benefit from unambiguous identification and convenient interchangeability of transducers resulting in reduced service and maintenance costs.
Advantages of TEDS include: 'Plug and Measure', which shortens setup time and therefore speeds up measurement; reduced errors during manual configuration of the measuring system; increased quality through automated use of calibration data; more reliability and enhanced reproducibility of test results thanks to unambiguous identification; improved transducer identification thanks to electronic link between sensor and data sheet; enhanced diagnostics options (exchange of transducer) that reduce maintenance time and effort; higher measurement accuracy thanks to integrated calibration information; and convenient transducer administration, as printed data sheets are no longer required.
Standard technologies such as IEEE1451 (TEDS) have not become widely established so far.
Nonetheless, they provide the perfect answer to the challenges posed by more complex systems and consistently high-quality requirements in the testing environment.
TEDS is a key technology ensuring continuous, smart data flow (time, quality, traceability) - covering sensor, signal conditioning, data recording, automation system and smart data management.
This makes introducing smart data flow or changing over to 'Advanced Plug and Measure' a promising project.
Three parties are involved in successfully introducing TEDS in measurement technology: first, any objections of actual users, for example test-bench engineers, must be thoroughly eliminated.
The opportunities and advantages provided by TEDS (total cost of ownership, investment versus gain of time) need to be presented to decision makers in a comprehensible way.
Investments can then be made for TEDS and existing processes can be adapted.
This also means instructing suppliers accordingly.
System integrators, for example test-bench manufacturers, need to standardise a concept for smart data flow.
In addition, they need to provide the corresponding interfaces and tools.
Manufacturers of data-acquisition systems will also have to contribute: they must act as consultants during the introduction of TEDS, point out the opportunities it offers and implement the required mechanisms.
Different requirements of test-bench engineers demand reliable transducer identification: an unambiguous code together with a central database is the most efficient solution.
For this purpose, TEDS needs to store a lot of information - a text-based approach, for example XML (Extensible Mark-Up Language) provides maximum benefit.
In general, it is now up to the parties involved to create a consistent commitment.
HBM's QuantumX range, which relies on TEDS, is a powerful package for measurement technology.
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