Operating Instructions
Integrated Transducer UVA-AS102
U326_UVAintAS102_B_e_070717
12/13
www.hoentzsch.com
A10 Troubleshooting
Fault Cause
Troubleshooting
no power supply
check connecting cable, measure voltage at
connecting terminals
green LED does not
light up
transducer electronics faulty return to factory
cable break or short-circuit
check terminals; check cable for continuity and
replace if necessary
yellow LED lights up,
green LED does not
flash despite flow,
analog output = er-
ror (<3.6 mA or
< -0.2V)
transducer or sensor electro-
nics faulty
return to factory
parameter error
check parameter with UCOM software, save new
checksum (or return to factory)
yellow LED lights up,
green LED flashes
with flow, analog
output = error (<3.6
mA or < -0.2V)
transducer electronics faulty return to factory
sensor contaminated
clean sensor according to instructions
no measured value
coefficient set at 0.000
set coefficient at 1.000
sensor contaminated
clean sensor according to instructions
coefficient setting too low
set coefficient at 1.000
input/output section too
short
change sensor position; improve flow con-
ditions with a flow rectifier
rotational flow
reposition sensor in flow direction; install flow
rectifier
reduced acoustic coupling in
the sensor elements as a
result of intense vibration or
a powerful impact
return sensor to factory for performance test
burden at current output is
greater than specified in the
Technical Data Sheet. This
results in correct output val-
ues in the lower range and
no longer increasing output
values at the top end of the
measuring range
reduce burden resistance
measured value too
low
incorrect scaling of analog
output
check setting and amend if necessary
coefficient set too high
set coefficient at 1.000
measured value too
high
EMC problem
see reference to electromagnetic compatibility
(EMC)
