Signal; Transducer - Siemens SITRANS F US SONOFLO Handbook

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SITRANS F US SONOFLO

SIGNAL

TRANSDUCER

10. Service
In the SIGNAL menu, information relating to amplification of the signal, signal amplitude and
signal to noise ratio is given as GAIN, SIGNAL LEVEL and S/N RATIO. GAIN can be between 1
and 60, depending on sensor type and size. The typical value for water is between 5 and 30.
The SIGNAL LEVEL is between 375 and 800 mV. A value less than 700 mV indicates variation
of the signal amplitude caused by variation in the attenuation due to e.g. air bubbles. The S/N
RATIO is a number between 1 and 40. The typical value for water is between 20 and 35.
The quality of the transducer and liquid oscillation is indicated by the RESONANCE LEVEL. A
number higher than 100 indicates satisfactory operation. A value below 100 indicates mis-
match between transducer and liquid. A value below 20 activates an alarm. If the RESONANCE
LEVEL is below 20 and the meter is not measuring (error code 5, 6 and 26), check connection
cables and check transducers manually. Please contact Siemens Flow Instruments.
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