Diagnosing and troubleshooting
10.11 Transducer ringing
HydroRanger 200 HMI
292 Operating Instructions, 06/2018, A5E36281317-AC
If multiple echoes appear on the echo profile, typical of a flat material profile (especially if the
vessel top is domed), use the “TF ” (True First) algorithm.
Should a stable measurement still not be attainable, contact Siemens representative.
If the transducer is mounted too tightly, or if it is mounted so that its side touches something
(such as a vessel wall, or standpipe), its resonance characteristics change and this can
cause problems. Hand tighten only. PTFE tape is not recommended as it reduces friction
resulting in a tighter connection that can lead to ringing.
Ring down times that extend into the valid measurement range can be interpreted by the
device as the material level, and reported as a steady high level.
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