Siemens SITRANS F US - 6.7 Main menu: Sensor parameters (menu 7)

SFIDK.PS.029.E5.02 / SW 2.01.07
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Gain, menu 6.5.1
Every transducer gain - level can be read.
These parameters are read only values and within the range of 0…255.
Unused tracks will show 0. Normal values are in the range of 10 to 100. High gain values refer
to a high sound absorption in the medium (max 255 for no sonic transfer).
Amplitudes, menu 6.5.2
This value shows the peak amplitude of the selected US-track in digital units from 0 … 255
which means 0…5 V. Optimum values are between 95 and 105. Worst possible values are
close to 0.
Trigger-levels, menu 6.5.3
The trigger level is used to recognize the ultrasonic signal. The trigger-level will be calculated
from the last signal level amplitude.
Error count %, menu 6.5.4
The menu shows the ERROR COUNTER in % for each track.
Time of flight (TOF), menu 6.5.5
The time of flight is the time the ultrasonic signal takes to travel from one transducer to the other.
The time of flight is dependent on sensor size, angle, media and temperature of the media.
Time of flight difference, menu 6.5.7
The time of flight difference is the measured difference: TOF up – TOF down.
Sensor calibration, menu 7.1
Calibration choice
7.1.1 Calib. The calibration choice WET WET or AUTO
choice
As is shown in menu 7.1.1 - calibration choice, the switching between WET and AUTO has a
big influence on the calibration and calculation of the flow value.
If AUTO selected is, the calibration constants will be taken from geometrical data entered from
the SONOKIT Measurement report.
When this automatic calibration is used, several more sensor characteristics will be combined
and calculated to form the internal calibration factor. These calculated calibration factors for
tracks 1, 2, 3, and 4 are then read only parameters which are accessible via PDM only.
6.7 Main menu: Sensor parameters (menu 7)
Important:
All sensor charachteristics in menu 7 are determined and preset at the factory. They
should not to be changed for flow meter systems with sensor types SONO 3100 and
SONO 3300.
For SONOKIT the FUS060 transmitter is preset at the factory according to the SONOKIT
order codes (pipe dimension, number of tracks). The exact sensor pipe dimension (from
the "SONOKIT - SENSOR GEOMETRY MEASUREMENT REPORT") must be entered in
menu 7.