2 Setting up a system
34 A04089_07_E00_02 HBM: public MX Modules
Transducer information stored in the TEDS data memory:
n The physical unit of the measured quantity (e.g. N for force) and its measuring
range
n The unit of the electrical output signal (e.g. mV/V for bridge transducers)
n The linear characteristics as the relation between the measured quantity and the
electrical signal
n If applicable, the requisite excitation and electrical power supply of the
transducer
Additional information that could be read out using relevant software:
n Transducer manufacturer, type, serial number, etc.
n 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:
n It is possible to access a TEDS module via two separate cable wires (“one-wire
circuit") or retrofit TEDS in the transducer connector.
n Amplifiers with direct connection of IEPE transducers support TEDS Version
1.0.
n 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").
n 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.
Retrofitting TEDS in transducer connectors
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
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