Appendix C: Troubleshooting

Measurement Difficulties

If the Failsafe Timer (P070) expires due to a measurement difficulty, LOE flashes alternately with the last known Reading. In rare cases, the MultiRanger may lock on to a false echo and report a fixed or wrong reading.

Flashing LOE Display

The loss of echo (LOE) display appears when the echo confidence is below the threshold value set in P805 Echo Confidence.

LOE occurs when:

The echo is lost and no echo is shown above the ambient noise. See low echo confidence (P805) and low echo strength (P806).

Two echoes are too similar to differentiate. See low echo confidence (P805) and low echo strength (P806).

If LOE is displayed, check the following:

Surface monitored is within the transducer maximum range

Transducer model (P004) matches the transducer used

Transducer is located and aimed properly

Transducer is not submerged without a submergence shield

Adjust Transducer Aiming

See the transducer manual for range, mounting, and aiming details. For optimum performance, adjust transducer aiming to provide the best Echo Confidence (P805) and Echo Strength (P806) for all material levels within the measurement range.

The most efficient method of checking echoes is with Siemens Milltronics Dolphin Plus software.

Displaying Echoes

Editing Parameters

Use Dolphin Plus to graphically display the echo profile at the installation. Interpret the echo profile and change relevant parameters.

Edit the parameter values. Use F1 to get online help at any time.

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Siemens 200 instruction manual Measurement Difficulties, Flashing LOE Display, Adjust Transducer Aiming