Troubleshooting

Radar Tank Gauge

 

 

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

Page 82
Image 82
Lightning Audio 7532 manual Level, Loss of echo

7532 specifications

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