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SFIDK.PS.029.Q3.02
53
9. Service
Service
SITRANS F US SONOFLO
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SIGNAL
INFORMATION
TRACK 2
TRACK 3
TRACK 1
TRACK 4
TIME / FLOW
SIGNAL
RECOGNITION
TRANSIT
TIME
DETECTION
COEF.
TIME
DIFFERENCE
FLOW
VELOCITY
SIGNAL
GAIN
SIGNAL LEVEL
S / N RATIO
CROSS
DETEC.
COEF.
9.3 Signal recognition
In the SIGNAL RECOGNITION menu it is possible to read the correlation coefficient for both the
transmission time and the difference time. The correlation coefficient is a number between 0 and
±
1. A figure close to 1 denotes a good correlation between the two signals. The DETECTION
COEFFICIENT states the quality of the determination of the transmission time. The CROSS
DETECTION COEFFICIENT states the quality of the determination of the difference time.
The quality of the oscillating transducer and liquid is indicated by the RESONANCE LEVEL.
A number higher than 100 indicates satisfactory operation. Less than 100 indicates mismatch
between transducer and liquid. A value less than 20 will raise an alarm. If the RESONANCE LEVEL
is less than 100 and the meter still operates, this is satisfactory. If the RESONANCE LEVEL is below
20 and the meter is not measuring, (error code 5, 6 and 26), check cable connections and manually
check transducers. Please contact Siemens Flow Instruments to establish.
9.4 Transducer
TRANSDUCER
C
TRANSDUCER
D
TRANSDUCER
A
TRANSDUCER
B
RESONANCE
LEVEL
RESONANCE
LEVEL
RESONANCE
LEVEL
RESONANCE
LEVEL
MAX.
GAIN
Time/flow
In the TIME/FLOW menu it is possible to read the average transmission time, e.g. the time the sound
takes to pass between the two transducers by zero flow in the pipe, the time differential and the
average flow velocity in the track.
Signal
(continued)