Siemens interranger DPS300 Instructional Manual page 105

If the DPS300 is mounted in proximity to (or transducer cables run near those of)
another ultrasonic level monitor. If they do, see Level System Sync (P726).
Temporarily disable nearby SCR control drives, high voltage or current contactors.
If the condition disappears, move the DPS300 to another location.
Increase the Confidence Threshold (small amounts at a time) while observing the
results. If performance is not improved return the Confidence Threshold to the
preset value.
Connect an oscilloscope to the DPS300, (see ENHANCEMENT PARAMETERS /
Scope Displays, P810). While monitoring the Echo Marker, select the Algorithm
(P820) best suited to the clarifier.
If the "Area" algorithm is used and narrow noise spikes are evident on the (long
shot) Echo Profile, turn the Spike Filter (P821) on and/or widen the Narrow Echo
Filter (P822). Also, if the true echo has jagged peaks, use Reform Echo (P823).
Should a stable measurement still not be attainable, contact Siemens or your local
distributor.
7ML19981BC01 InterRanger DPS300
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