Siemens SITRANS F US SONOFLO SONO 3300 Handbook page 45

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SITRANS F US SONOFLO
Length
Angle of ultrasonic track
Displacement
Zero adjustment
7. Starting up
The track length (L) is the distance between the two transducer windows in the same track.
The angle (θ) is the track angle, i.e. the angle between the track and centerline of the pipe.
Retrofitting kit type SONOKIT will as standard have an angle close to 60°.
The track displacement (h) is the distance between the track and the center plane of the pipe. In
case of a one-track system where the track is placed in the center plane of the pipe the displacement
is 0. In a normal two-track system, where the two-tracks are placed symmetrically in the pipe the
displacement is equal to half the track distance (H/2).
The factory setting is applicable in most cases, but if the user requires a high accuracy at low flow,
an APPLICATION dependent zero adjustment, NEW AUTO ZERO is recommended.
The AUTO ZERO adjustment is initiated when the LOCK key is pressed. The zero adjustment will
take approx. 60 seconds. During the process the text BUSY and a count down from 300 will be
displayed. When the process is finished 0.0000 is displayed.
If the meter detects flow in the pipe during the zero adjustment proces, the zero adjustment
proces will be interrupted and an error message displayed.
The signal converter stores the result of the second previous AUTO ZERO adjustment in the register
under "OLD".
SFIDK.PS.029.Q3.02
SET ZERO
FACTORY
ZERO
NEW AUTO
NEW AUTO
ZERO
ZERO
OLD AUTO
ZERO
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