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What is TEDS?
TEDS stands for Transducer Electronic Data Sheet based on the IEEE 1451.4 standard. It contains relevant information relating to the sensor, such as serial numbers, calibration factors or manufacturer specific information.
What is the purpose of TEDS?
TEDS will simplify the configuration of electronic equipment by providing all the information needed for setting up and calibration of electronics. Ideally the electronics would self configure.
What is TDL?
TDL stands for Transducer Description Language. Similar to a computer language TDL allows storage of TEDS parameters in the most space efficient manner. This data compression is needed due to the limited amount of storage space available in typical TEDS memory.
What is a TEDS template?
A TEDS template is defined by the TDL and 1451.4 standard. The template is a set of fields that define data type, data size, and actual information.
How is TEDS stored?
TEDS can be stored in any type of electronic memory. Typically the Dallas 1-Wire based memory is the preferred memory due to low pin out count and ease of integration into sensors. However data space is limited.
How is TEDS implemented?
TEDS is implemented by using a 1-Wire eeprom device. This device receives and transmits bits of information that is permanently stored or changed as desired. The host instrument is responsible for the data transfer.
How are TEDS created?
The IEEE 1451.4 standard provides predetermined templates for most sensors. However by using the TDL language new templates can be created. The TDL code would then be provided to the end user. It then becomes their responsibility for translation.
What are the benefits of TEDS?
- Calibration information can be stored in the sensor itself; losing certificates will not be a problem.
- Sensor specific information can be updated at any time.
- Auto-configuration of TEDS enabled instrumentation. Would allow quick swapping of sensors as needed and save time.
- Standard TEDS templates are available for virtually any type of sensor.
What are the limitations of TEDS?
- Chip could be damaged due to mishandling or possible ESD discharge. Data would be irrecoverable.
- Chip could be accidentally written over, losing information.
- Instrumentation may not support all templates or configurations.
- Templates may not support all desired parameters.
- Calibration discrepancies exists between instrumentation, even if the same type. Meaning that a specific sensor output may not match if interfaced to different instruments. TEDS is designed as an information carrier. Use in calibration or auto configuration may carry some accuracy discrepancies.
Is “TEDS” option available on FUTEK products?
Yes for all sensors and selected instruments such as IPM500, IBT500 & also CSG series in-line amplifier.
Does FUTEK upgrade existing customer sensors with “TEDS” option?
Yes.
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