20
User’s Guide 2014
Troubleshooting
Troubleshooting should be confined to establishing whether the fault lies in the flowtube
assembly or in the signal convertor.
The information provided should assist in this.
The flowtube coils have a resistance of approximate
ly 20Ω.
All meters smaller than 600mm are supplied with the coils connected in series, giving a
measured value of
approximately 40Ω at the terminals @ 20°C.
600mm and larger have the coils in parallel, giving a coil resistance of 10
Ω.
If the coil resistance differs from these values, it indicates a fault in the measuring head.
Error / Warning Messages
ERROR MESSAGE
ERROR
POSSIBLE SOLUTION
# empty pipe
•
No liquid in flowtube
•
Faulty electrode / coil
cable
•
Fill pipe
•
Repair / replace cable
# no coil current
# low coil current
•
Faulty cable
•
Faulty flowtube
•
Faulty converter
•
Repair / replace cable
•
Check coil resistance
(<600mm 40 ohms
>600mm 10 ohms)
# rate overflow
# reverse flow
# ATD overflow
# triac error
•
Rate > 999 999
•
Flow too high
•
Coil pulse failure
•
Select more suitable rate
units
PROBLEM
POSSIBLE SOLUTION
Meter not reading
•
Reverse flow
•
No flow
•
Contaminated electrodes
•
Leaking electrodes
•
Turn meter around or reverse coil wires
•
Establish a flow
•
Remove flowtube and clean electrodes
•
Replace flowtube
Meter reading lower/higher than expected
•
Incorrect data
programmed
•
Faulty display unit
•
Leaking electrodes
•
Program correct data
•
Replace display unit
•
Replace flowtube
