Flow-Meter Repair Procedure - Elis FLONET FN50 Series Design, Assembly And Service Manual

ELIS PLZEŇ a. s.
Error removal and meter repair activities should be reserved to duly qualified staff skilled is maintenance of
electronic equipment and acquainted with the labor safety rules applicable to the plant concerned. On
request, the meter manufacturer will provide training for such staff. The manufacturer's responsibility for any
meter damage due to incorrect handling is precluded.
Prior to any work on the meter such as disconnection or removal of printed circuit boards, sensor
disconnection, etc., make sure that the supply voltage is disconnected. At all times, be aware of the danger
of electric shock.

8.1. FLOW-METER REPAIR PROCEDURE

Prior to any maintenance or repair action on the internal parts of the meter control unit including the power
source, sensor disconnection, PC boards, etc. make sure that the supply voltage is disconnected. Warning:
disregarding this instruction implies risk of electric shock.
The self-diagnostic feature of the electronic unit concerns basic errors indicated via LED diode – lighting
(lightless), flashing (not flashing), flashing regularly (irregularly).
On the basis of these conditions possible to check status of the flowmeter. Correct status is that when the
LED is flashing regularly about 3 times per second for small sizes, for bigger sizes is flashing slowly. A
velocity of flushing matches with velocity of excitation of coils. The second LED is red and it must flush 1 per
second. If a fault occurs it will appear by changing LEDs flashing.
Of course, it can't be evaluated all possible faults, that even when the LED lighting correctly number of
output pulses and their frequency may not correspond to the measured flow.
Because the flowmeter has no display, it is the only visual check of status of the meter via LED on the circuit
board (after removing the cover and cover plates electronics). It is necessary to connect PC with diagnostic
software and in the section "ERRORS" to check, which error is signalized:
Code
Description of error
error
E00 No error
E01 Overload of a range AD
E02 Step change of flow
E03 Error of reading /recording to
memory
E04 Other error of the transmitter
block
E05 Alert -it is not possible to
calibrate zero flow.
E06 Low of current of excitation
E07 Short circuit of excitation
coils
–
E08 Information
doing, any measurement
E09 Hight resistance of measured
medium
E10 Error of output OUT1
E14 Exceeded over flow Q4
ELIS PLZEN a. s., Lucni 425/15, 301 00 Plzen, Czech Republic, Phone: +420/377 517 711, fax: +420/377 517 722
Design, Assembly and Service Manual
Electromagnetic flowmeter FLONET FN50xx.1
Over limit flow rate
(Short time of step change of flow in the range from 0 to Q
If this error lasts, the PC board is in defect.
See code error E01
In case of big error of time RTC it is necessary to change of backup battery
on the processor board. If this error lasts still, it is necessary to change the
block of a transmitter.
If this error lasts, it is necessary to change the block of a transmitter
(processor board, board of outputs, board of measurement).
To repeat a calibration of zero flow after several seconds. If this error lasts,
it is necessary to change the block of a transmitter (processor board, board
of outputs, board of measurement).
Open circuit of excitation = defect of a sensor or interrupted connection
between a transmitter and a sensor
Defected board of measurement
If this error lasts, it is necessary to change the block of a transmitter
(processor board, board of outputs, board of measurement).
Short circuit of excitation = defected sensor or shorted connection between
a transmitter and a sensor
Checking of signal cables
Check a sensor by Simulator SF1.0.
zeroing is A flowmeter does not measure for time of 1 min. This information is
missing after finishing of zeroing and a measure again normally.
Indication of empty pipe.
Frequency output over 10 kHz.
Frequency of pulse output over 100 Hz.
Gap between pulses is shorten than duration of pulse.
Checking of Q
If this error lasts, it is necessary to change the block of a transmitter
(processor board, board of outputs, board of measurement).
Possible reason/removing of an error
–
(100%)
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