OPERATING THE ULTRASONIC COMPUTER
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Manual USZ 08 · EN05 · 2015-06
33
HN path 1
Access Line
Designation
Value
Unit
A §
1
Corrected velocity
0.000
m/s
Path velocity as used for flow determination.
D
2
Status
Uncertain
Status of determination of HN 01.
Uncertain
Specified status after a restart of the corrector or
setting with signed-off path.
Source value
with direction 1
or
with direction 2
Procedure followed if path is undisturbed.
Replacement value
with direction 1
or
with direction 2
Procedure followed if path is disturbed. The cause
for path disturbance can be seen in
HN 10
.
I
3
Genuine velocity
0.000 m/s
Original path velocity obtained from the sensor system.
D
4
Substitute value
0.000 m/s
Current replacement value. This value is obtained from a linear
combination of all path velocities (except for path 1). The
coefficient matrix
is obtained during the undisturbed phase by
monitoring and averaging the velocity ratios. The averaging
behaviour can be set in
GI 01
.
I
5
Measurem. quality
0 %
Current measurement quality as reported by the sensor
system. The measurement quality can be in the range from 0
to 100 percent. The minimum measurement quality expected
can be set in
GI 07 Measurement quality
. If the measurement
quality falls short of this value, the path will be deemed to
have failed.
D
6
Communic. quality
0 %
Current communication quality. The communication quality
can be in the range from 0 to 100 percent. It is to be
determined as follows.
Fatal errors will immediately reduce the quality to 0%.
Syntactical errors will reduce the quality by 20%.
A noise is expected regarding the measured values. If the
sensor system successively transmits the same set of
measured values, quality will be reduced by 12 percent.
Every single communication primitive failed will reduce
quality by 1%. There are 15 primitives per path and
correction cycle, so that in the worst case the total effect
can be 15% per path and corrector cycle.
With each correction cycle, quality will be reduced by 1%.
This will result in a general trend towards deterioration
taking unknown or unconsidered cases into account.
Every perfectly performed total communication cycle (of
all paths) will lead to an improvement in quality by 10%.
The minimum communication quality expected can be set in
GI
08 Communication quality
. If the communication quality falls
short of this value, the path will be deemed to have failed.
I
7
VOS
0.00000 m/s
Original velocity of sound obtained from the sensor system.
