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FLOWSIC600 · Technical Information · 8010125 V 4.0 · © SICK AG
Flow Calibration
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3.3.8.2
Evaluation of the "ZeroPhase"
Open the "Path Diagnosis" page (see
)
Check the "Zero Phase" parameters of both transducers on each path (path 1, 2, 3, 4)
Properly adjusted zero phases of the individual paths are the basis for accurate transit
time measurement of the ultrasonic signals. The "Zero Phase" parameter of a path is
properly adjusted, when the green cursor in the signal window is symmetrically within the
two dotted red limit lines and the red asterisk is positioned exactly on the second positive
zero crossing of the received ultrasonic signal. This adjustment is ideally performed with no
flow.
Figure 29
"Path Diagnosis" wizard in MEPAFLOW600 CBM
If the zero phase values do not meet the aforementioned criteria, the zero phase needs to
be adjusted according to Section
.
Check box "Air test"
Activating this check box sets the Pressure (fix) parameter value internally to 1
bar. The meter then operates with the low pressure Reynolds numbers (low
pressure curve).