Troubleshooting | Radar Tank Gauge |
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ErrorOutput
Possible cause
Remedy
If the surface is not calm (e.g. filling, emptying, agi- tator run- ning), the measured value
jumps sporad- ically to a higher
level
20 mA/100% |
|
actual |
|
| expected |
4 mA/0% | t → |
20 mA/100% |
|
| actual |
| expected |
4 mA/0% | t → |
Signal is weakened by the rough surface — the interference echoes
are sometimes stronger
1.Carry out tank mapping → basic setup
2.Set the process cond. (004) to "turb. surface" or "agitator"
3.Increase the output damping (058)
4.Optimize the orientation
5.If necessary, select a better mounting position and/or larger antenna
During filling/ emptying the measured value jumps downwards
Multiple echoes
20 mA/100% |
|
actual |
|
| expected |
4 mA/0% | t → |
yes →
1.Check the tank shape (002), e.g. "dome ceiling" or "horizontal cyl"
2.In the range of the blocking dist. (059) there is no echo evalua- tion
→ Adapt the value
3.If possible, do not select central installation position
4.Perhaps use a stilling well
E 641 (loss of echo)
20 mA/100% |
|
| actual |
E 641 |
|
expected |
|
4 mA/0% | t → |
Level echo is too weak.
Possible causes:
•Rough surface due to filling/ emptying
•Agitator running
•Foam
yes →
1.Check application parameters (002), (003) and (004)
2.Optimize alignment
3.If necessary, select a better installation position and/or larger antenna
E 641 (loss of echo) after turn on the power supply
If the instrument is configured to Hold by loss of echo the output is set to any value/current.
noise level during the initialisation phase to high.
Repeat once more empty calibr. (005).
Caution!
Before conformation change with
Oor S to the edit mode.
82 | Installation and Operations Manual |
