HBM TEDS, Руководство по эксплуатации

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7
TEDS
A1813-1.1 en HBM
2 The contents of the TEDS memory
The information in the TEDS memory is organized in table form.
Only the entered values are stored in the TEDS memory itself.
The amplifier firmware assigns the interpretation of the respective numerical
values. This places a very low demand on the TEDS memory.
What is stored on the module?
The memory contents are divided into four areas
• Area 1
An internationally unique identification number (cannot be changed).
•
Area 2
The base area (basic TEDS) to the configuration defined in standard
IEEE 1451.4. This contains the transducer type, manufacturer and serial
number of the transducer (writing to or amending this area requires user
rights for the ID level).
• Area 3
This
area contains characteristic transducer data that can be defined by the
manufacturer, by calibration or by the user. They are organized into
so-called templates which store defined groups of data in a summarized
form.
At least 1 template must be present for transducer description; this
contains the specification
- the transducer type,
- the measured quantity,
- the electrical output signal,
- the required excitation,
- the characteristic curve, etc.
The standard specifies templates for the most important types of
transducers. HBM has developed a dedicated template for other HBM
transducer types in the form laid down in the standard.
Optionally, additional templates can be used – partly defined by the standard,
partly by HBM – to store further information in the transducer, e.g.
compensating polynomial expressions from a calibration.
As a guide to the terms with which the templates work,
Chapter 4 contains the main templates with explanations.