ProMinent DULCOTEST BCR 1-mA-0.5 ppm Guide De Montage Et De Service page 52

Instructions for troubleshooting and fault remedy
Fault
Sensor measured value is
0 ppm and fault message
appears at the controller
Sensor measured value is
0 ppm and sensor current
is 3.0 to 4.0 mA
52
Possible cause
The measuring range was
significantly exceeded, pos‐
sibly as a consequence of
a calibration with DPD 1 in
the presence of organic
bromination agent such as
BCDMH
Deposits (carbonate, man‐
ganese, iron oxide, bio-film)
have blocked the mem‐
brane.
pH value > pH 9.5
No electrolyte in the mem‐
brane cap
Sensor connected to the
controller with incorrect
polarity
Measuring line broken
Sensor defective
Controller defective
Run in period too short
Interfering substances that
consume bromine, e.g.
reducing sulphur com‐
pounds
Zero point has shifted
Reference electrode defec‐
tive )
Remedy
Replace membrane cap,
allow sensor to run in and
calibrate
Lower pH value (pH 6 ...
9.5)
Fill with new electrolyte
Connect the sensor cor‐
rectly to the controller
Replace measuring line
Send away sensor
Check the controller with a
sensor simulator (DULC‐
OMETER simulator, order
®
no. 1004042), if defective,
then send in
Observe the run in period
Check water for interfering
substances and remedy the
problem
Zero point calibration
Send sensor in for regener‐
ation