Siemens SITRANS FUS060 Operating Instructions Manual page 57

Scaling (menus 3.1.x, 3.2.x and 3.3.x )
According to the PROFIBUS PA profile there are no selectable measuring ranges for process
devices only sensor limits. Valid measured values (status "good") are always inside the following
sensor size depending limits. The flow limits correspond with a flow velocity of 12 m/s and are
automatically converted into kg/h for mass flow using the set density (menu 3.1.4); Sound
velocity: 200 to 2000 m/s (menu 3.2) ; Ultrasonic amplitude: 1 to 150 % (menu 3.3).
Measured values outside the sensor limits are displayed but are no longer within the specified
range. "uncertain, nonspecific, low limited" or "uncertain, nonspecific, high limited" will be
signaled in the measured value status (Table 4-6, see above).
The physical measured values can be converted with a linear representation function according
to Figure 5-1 to user-specific output values. A physical measuring scale with lower value, upper
value and appropriate unit should be selected for this. This measuring scale is represented
linearly on an output scale which is also defined with a lower value, upper value and appropriate
unit.
All measured values are converted linearly into output values according to this scale even if they
are outside the scale ranges.
Note
If a user-specific scale is not required, the measuring scale and output scale must be set
identically (e.g. factory setting). The position and size of the scale ranges do not have any
influence. The output values will then be identical to the physical measured values. The upper
value on the output scale for flow is also the reference value for the upper frequency on digital
output 1 (menu 4.2.5, chapter below). The lower value = 0 should be selected for the output
scale to obtain a sensible assignment between the flow and frequency. The flow display in %
(menu 1.1.4) is also related to the output scale.
Figure 7-1
SITRANS FUS060 with PROFIBUS PA
Operating Instructions, 09/2021, A5E02225054-AD
Assignment between measured value
7.3 Measuring functions (menu 3)
Functions
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