Dwyer UXF2 - Manual (Page 116)

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Detail of received waveform
CH1
(S1)
Peak variation
Time base variation
CH1 : 500mV/div
Time base : 1 to 2
μs/div
Extension of time base
of received waveform
Points
1. Before reaching the maximum amplified signal wave, the number of waves must be 3 to 5. If the startup of
received waveform is not sharp enough, then the piping parameter input may be wrong or the detector mounting
may be not proper. Check the piping parameters, and how the detector is mounted referring to "Measurement
value does not change while flow rate does (LED lit red)" in Section 5.7.3 "If measurement value is abnormal".
2. Peak (amplitude) variations are not allowed. If peaks fluctuate up and down, bubbles are mixed. Take an
action referring to the item of "Ingress of bubbles" of "Measurement value does not change while flow rate does
(LED lit red)" in Section 5.7.3 "If measurement value is abnormal".
3. The time base must not fluctuate. If it does, there may be influence by turbulent flow or drift current. Take an
action referring to the item of "Measurement value fluctuates excessively while flow rate is constant." in Section
5.7.3 "If measurement value is abnormal".
5.7.6. Remedying a hardware fault
If the hardware is found faulty upon interventions in Section 5.7.1 to Section 5.7.5 above, specify details of anomaly to us.
BULLETIN F-70