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SFIDK.PS.029.Q3.02
43
7. Starting up
Starting up
SITRANS F US SONOFLO
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Relay
The relay can be set to indicate flow direction, sound limit or error. The error output is only available
on relay no. 1.
The sound limit is defined in the mass flow submenu. Select scaled mass flow and enter SOUND
VELOCITY 1 and SOUND VELOCITY 2. The relay will make when the sound velocity exceeds the
range defined by SOUND VELOCITY 1 and SOUND VELOCITY 2.
SOUND VELOCITY min. and max. are part of the error message when ERROR is selected.
Calibration options
Wet calibration
The calibration factor cannot be changed when the signal converter is connected to a SENSOR-
PROM
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unit. With no SENSORPROM
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unit the cal. factor is manual set.
Selecting "Auto" will allow the converter to calculate a theoretical calibration factor based on the
information entered in the APPLICATION and PIPE GEOMETRY menus.
The theoretical cal.factor is a function of viscosity of the liquid, the internal pipe diameter, the
roughness, the number of tracks, the transducer distance, the track angle and the displacement of
each track.
Automatic calibration can be used only on straight tube flowmeters.
Auto calibration
Application parameters