7ML19985AN02 SITRANS LU10 – INSTRUCTION MANUAL Page 97
mmmmm
Troubleshooting Guide
Troubleshooting Guide
SYMPTOM CAUSE ACTION
Display blank, Transmit Neon
not flashing, transducer not
pulsing
No power Check power supply, wiring and
voltage selection switch.
No response to programmer Obstructed infrared interface, or
defective programmer
Clean enclosure "docking bay" and
programmer magnet slot.
Displays "Short" and "tb:(#)" Short circuited transducer cable,
or defective transducer
Repair or replace as necessary.
Displays "Open" and "tb:(#)" Transducer not connected Connect transducer, or remove
Point # from service (P001=0).
Open circuited transducer cable,
or defective transducer
Repair or replace as necessary.
Displays "Error" and "tb:(#)" Transducer connected wrong Reverse BLK and WHT wires.
Wrong Transducer (P004) Enter correct value.
Displays "LOE" Weak or non-existent echo Relocate and / or reaim trans-
ducer at material level or object.
Proceed to "Measurement Diffi-
culties", (following page).
Displays "EEEE" Reading too high Select larger Units (P005), or
lower Convert Reading (P061).
Displays "EEEPrO" Faulty EEPrOM memory chip Return to factory for repair or
replacement.
Reading fluctuates while
material level is still, (or vice
versa)
Incorrect measurement stabiliza-
tion
Alter Measurement Response
(P003) accordingly.
See
Technical Reference
Mea-
surement Response.
Reading is fixed, regardless of
the actual material level
Transducer beam obstructed,
standpipe too narrow, or trans-
ducer mounting resonant
Relocate and / or reaim trans-
ducer at material level or object.
Proceed to "Measurement Diffi-
culties", (following page).
Material level reported is
always "off" by the same
amount
Incorrect Empty (zero) reference See Empty (P006),Reading Offset
(P063), Offset Calibration (P650), &
Offset Correction (P652).
Measurement accuracy
improves as level nears trans-
ducer
Incorrect Sound Velocity used for
distance calculation
Use an ultrasonic / temperature
transducer or a TS-3 temperature
sensor.
See
Technical Reference
Sound
Velocity.
Reading is erratic, with little or
no relation to material level
True echo too weak or wrong
echo being processed
Relocate and / or reaim trans-
ducer at material level or object.
Proceed to Measurement Difficul-
ties.
To Next Page
Loading...
