Siemens HydroRanger 200 HMI Operating Instructions Manual page 230

Symptom
Reading fluctuates
while material level is
still
Page 220 HydroRanger 200 HMI – OPERATING INSTRUCTIONS
Cause
Material level is changing
Strong false echoes
Incorrect damping
Improper echo algorithm selec-
tion
High noise levels
Weak echo
Foam on surface of material
Rapid temperature changes
Faulty temperature sensor
Vapors
Action
Visually verify, if possible.
Determine source of false echoes;
relocate transducer to avoid
source.
2.3.4.
Adjust damping. See
Response Rate
on page 125.
Set algorithm to default. If no
improvement, try a different algo-
2.11.2.2. Algorithm
rithm. See
page 160.
Verify source and minimize. See
Noise problems
on page 226.
Determine cause.
Check noise, confidence, and
3.2.9. Echo
echo strength. See
Quality
on page 192.
Eliminate source of foaming.
Use stilling well.
Use an external temperature sen-
2. 1 1.1.4. Temperature
sor. See
Source
on page 157.
Verify operation;
replace if required, or use fixed
2. 1 1.1.4. Tempera-
temperature. See
ture Source
on page 157.
If fluctuation is unacceptable, con-
sider an alternative technology.
Contact your Siemens representa-
tive.
on
A5E36281317