Troubleshooting Radar Tank Gauge
82 Installation and Operations Manual
Error Output 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
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 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)
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
O or S to the edit mode.
20 mA/100%
4 mA/0% t →
actual
expected
20 mA/100%
4 mA/0% t →
expected
actual
20 mA/100%
4 mA/0% t →
expected
actual
20 mA/100%
E 641
4 mA/0% t →
actual
expected
