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Bayern Hessen Error status:
Bit-Number
Function
Description
Averaging time < 10sec An error is output when no new measured
value can be determined during a period of
10sec.
Bit 0
General malfunction
Averaging time >= 10sec An error is output when, based on a one-
second measuring rate, less than 50% of
values are contained in the averaging
buffer.
Example: With an averaging time of 10
seconds at least 5 measured values must
be contained in the averaging buffer.
Bit 1
Static malfunction
Is set when a static malfunction has occurred, e.g. lasting violation of
VT, no measured values. (> 1min)
Bit 2..7
reserved
Always zero
7.4.6.4 Status information in telegram 9
Telegram 9 has a separate status information, consisting of one byte.
Bit-Number
Function
Description
Bit 0
Data error
Data valid (0) / invalid (1)
Bit 1
Bit 2
Bit 1
Temperature difference
0
0
0,0K..3,1K
0
1
3,2K..6,3K
1
0
6,4K..7,9K
Bit 2
Temperature
difference X and Y
1
1
>7,9K
Bit 31
Bit 4
Bit 3
Buffer fill level
0
0
100%
≥
x > 80%
0
1
80%
≥
x > 66%
1
0
66%
≥
x > 33%
Bit 4
Buffer fill level
1
1
< 33%
Bit 5
reserved
Is always zero
Bit 6
reserved
Is always one
Bit 7
Heating on
Is one when heating is switched on
7.5 Behavior of Instrument under extreme Conditions of Measurement Value
Acquisition
The ULTRASONIC is equipped with a highly effective internal fault detection and correction
system. This allows it to detect incorrect measured values using the history and to correct them
where possible . It cannot however be ruled out that the ULTRASONIC will get into a situation in
which the acquisition of new data is impossible. In this case the error bits are set in the status
values and a defined value possibly output at the analog outputs.
It is a basic rule that the measured values output are always valid and can be interpreted by the
target system (unless a specific error telegram is output in the in the case of error). In the case of
error might happen that the data become 'too old', i.e. they are not updated over a certain time and
freeze. In this case the error bits are set in the status byte and the analog outputs are set to a
defined value. If a special error telegram is defined with a serial telegram, this is output.