TEDS (Transducer Electronic Data Sheet) refers to the electronic data sheet of a transducer or sensor that is stored in a small electronic chip or appropriate module which is permanently connected to the device in the transducer housing, the inseparable cable or the connector plug.
TEDS allows automatic parameterization of a channel immediately after a sensor has been connected. Every measurement channel allows reading or writing of sensor data to the TEDS chip. The sensor database is used to describe a sensor. If a TEDS sensor is connected, this information is written. In addition, valuable meta‐data such as calibration data are delivered providing important information for the traceability of measurements or tests.
NOTE
The function and working method of TEDS are defined in Standard IEEE1451.4.
Transducer information stored in the TEDS data memory:
Additional information that could be read out using relevant software:
The amplifiers in the SomatXR series are capable of reading the transducer information stored in the data sheet and automatically converting it into amplifier settings to enable rapid and safe measurement operation.
The electronic data sheet is read automatically as soon as the transducer is connected to the device. The electrical bridge between two pins in the plug serves as the “transducer identification". The amplifier switches automatically to the configured measurement mode after the digital identification mode.
The TEDS data can also be read in via a software command, e.g. with catman®AP.
SomatXR Ultra-Rugged DAQ supports several options for reading and writing TEDS data:
NOTE
Further information about TEDS topics can be found at http://www.hbm.com/teds.
NOTE
If using a TEDS calibration table for nonlinear transducer scaling, make sure that the TEDS chip is written by the HBM TEDS Editor version 3.4.0.6 or later; catman® version 3.4.1 or later; or QuantumX/MX Assistant version 2.6.R1 or later.
The IEEE standard 1451.4 defines a generally acknowledged process with which sensors can be identified. The sensor is identified via the respective data sheet which is stored in electronic format in the sensor, cable or plug on a 1‑wire EEPROM (TEDS - Transducer Electronic Data Sheet). The amplifier communicates with this EEPROM via the serial 1‑wire interface, reads the data sheet and makes the corresponding amplifier settings.
HBM recommends the TEDS chip (1‑wire® EEPROM) DS24B33 from Maxim. HBM offers a package with 10 TEDS (1-TEDS-PAK).
Reference