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What is TEDS?
TEDS, or Transducer Electronic Data Sheet, is a set of electronic data
in a standardized
format defined within the IEEE 1451.4 standard. This data specifies what
type of sensor
is present, describes its interface, and gives technical information such
as sensitivity, bridge
type, excitation, etc.
Are TEDS sensors the same as "Plug and Play" sensors?
Yes. "Plug and Play" sensors refer to the emerging IEEE 1451.4
specification of sensors
that contain calibration or configuration information in memory on the
sensor. This information
is normally stored in an EEPROM chip attached to a sensor. By having this
chip, the sensor
can identify and describe itself to the network and or Smart Load Cell
Meter, thereby easing
automatic system configuration. Let's say you have a Transducer Techniques
Load Cell or
Torque Sensor with the
CAL-TEDS option. Using the proper instrument (DPM-3
Smart
Load Cell Meter), any other Transducer Techniques IEEE 1451.4 enabled
Load Cell or
Torque Sensor could be swapped in, self-identify, and work appropriately.
What are the advantages of TEDS?
Benefits that can be experienced now include:
- Simplified troubleshooting
- Reduced safety risks. It is no longer necessary to
"climb on machines" for connection verification
- Reduced costs for set-up and tear-down
- No recalibration is needed when replacing sensors
- The data acquisition system can recalibrate itself
Advantages that will be available in the future include:
- Integration with wireless transceivers
- Elimination of large lengths of analog wiring
- Reduced installation, maintenance and upgrade
costs of measurement and control systems
- The opportunity to add intelligence to sensors
Can a legacy / non-TEDS sensor
be converted to a TEDS "Plug and Play" sensor?
Yes. A legacy / non-TEDS sensor can be converted to a TEDS "Plug
and Play" sensor. Transducer Techniques
offers a
CAL-TEDS service to convert your sensor to a TEDS "Plug and
Play" compliant sensor.
The service consists of a connector, recalibration and a programmed EEPROM.
This will update a
legacy / non-TEDS sensor to be capable of plugging into Transducer Techniques
IEEE 1451.4 compliant DPM-3
Smart Load Cell Meter.
What is Virtual TEDS?
Virtual TEDS is an online library of data sheets developed by National
Instruments (www.ni.com)
that contain the same information that would be found in an EEPROM TEDS,
but exist for sensors
not containing the EEPROM. This would define Plug and Play capability
for legacy / non-TEDS sensors. As a
National Instruments Plug and Play Sensor Partner and a National Instruments
Alliance Member,
Transducer Techniques has contributed the data for all its sensors to
the Virtual TEDS database.
What
parameters are included on a Transducer Techniques
TEDS chip?
| TEDS Item |
Values |
| Manufacturer ID |
Transducer Techniques (ID#42) |
| Model Number |
28 |
| Version Letter |
A |
| Version Number |
3 |
| Serial Number |
149087 |
| Transducer Electrical Signal Type |
Bridge Sensor |
| Minimum Physical Value |
0 lb |
| Maximum Physical Value |
100 lb |
| Minimum Electrical Value |
0 V/V |
| Maximum Electrical Value |
.0024709 V/V |
| Mapping Method |
Linear |
| Bridge Type |
Full |
| Impedance of Each Bridge Element |
350 Ohm |
| Response Time |
.000001 sec |
| Excitation Level (Nominal) |
10 V |
| Excitation Level (Minimum) |
1 V |
| Excitation Level (Maximum) |
12 V |
| Calibration Date |
1/1/2004 |
| Calibration Initials |
RAB |
| Calibration Period (Days) |
365 days |
| Measurement Location ID |
0 |
| Users Data |
Thank You From TTI |
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