7ML19981CJ01 MiniRanger Plus Page 71
Troubleshooting
Troubleshooting
The following is a list of operating symptoms, their probable causes and the
actions needed to resolve them.
Symptom Cause Action
Loss of echo
display reads ‘Short’,
no pulsing is felt on the
transducer face
connection of a
transducer without a
built-in temperature
sensor (ST 25C)
check transducer type
and correct P004 if
required.
short circuit or
reverse wiring
check transducer wiring*
defective transducer check maximum
temperature P300
against transducer rating*
try substitute.
open circuit display reads ‘OPEN’,
no pulsing is felt on the
transducer face
defective transducer
or circuit board
check transducer wiring*
check maximum
temperature P300
against transducer rating*
try substitute.
level or target is out
of range
application too dusty
or steamy, under
these conditions,
range can be
adversely affected.
display reads,
pulsing is felt on
transducer face.
material build up on
transducer face
check transducer
specifications*
check calibration
parameters
re-aim transducer*
use foam faced
transducer for dusty
applications*.
try using a longer range
transducer.
increase fail-safe timer,
P070
clean
move transducer to a
better location
mount in standpipe
*refer to associated transducer manual.