TEDS

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:

  • The physical unit of the measured quantity (e.g. N for force) and its measuring range
  • The unit of the electrical output signal (e.g. mV/V for bridge transducers)
  • The linear characteristics as the relation between the measured quantity and the electrical signal
  • If applicable, the requisite excitation and electrical power supply of the transducer

Additional information that could be read out using relevant software:

  • Transducer manufacturer, type, serial number, etc.
  • Calibration date, recalibration interval, calibrator's initials, etc.

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 Rugged DAQ supports several options for reading and writing TEDS data:

  • It is possible to access a TEDS module via two separate cable wires (“one‑wire circuit") or retrofit TEDS in the transducer connector.
  • Amplifiers with direct connection of IEPE transducers support TEDS Version 1.0.
  • A special TEDS module is integrated in some HBM transducers, this can transmit the TEDS data via the feedback line of a sensor (patented “zero‐wire circuit").
  • Thermocouple and pressure amplifiers with RFID chips on the transducer connector support the TEDS technology.

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.