ProMinent DULCOTEST BRE 1-mA-10 ppm Mode D'emploi page 43

Fault
Sensor can not be calibrated:
Measured value lower than
DPD-measurement
Measured value of sensor
is 0 ppm and error message
"Check Bromine Input"
appears on
®
DULCOMETER D1C display
Measured value of sensor
is 0 ppm and sensor current
is 3.0 - 4.0 mA
®
ProMinent
Possible Cause
1) Run-in time too short
2) Deposits on membrane cap
3) Flow rate of sample water too low
4) Air bubbles on the outside of the
membrane
5) Interfering substances in sample
water (surfactants, oil, alcohols,
corrosion inhibitors)
6) Measuring range was noticeably
exceeded. This may occur also
as a consequence of calibration
with DPD 1 in presence of
organically bound bromine as
disinfectant e.g. BCDMH
7) Deposits (carbonate, manganese,
iron oxide) have blocked
membrane
8) pH-value > pH 9.5
9) No electrolyte present in
membrane cap
1) Sensor is connected to controller
with wrong polarity
2) Signal lead is broken
3) Sensor defective
4) Controller defective
1) Run-in time too short
2) Interfering substances in sample
water which deplete Bromine
e.g. reducing agents like sulphur
compounds
3) Zero point has shifted
4) Reference electrode defective
(see 1)
Troubleshooting
Action
See Chapter 8.1 "Run-in period"
Replace membrane cap (see
Chapters 6, 8.1 "Run-in period"
and 8.2 "Calibration")
Correct flow rate (see Chapter 14,
"Technical data")
Increase the flow rate within the
permitted range
Confer with ProMinent
Replace membrane cap (see
Chapters 6, 8.1 "Run-in period"
and 8.2 "Calibration")
Replace membrane cap (see
Chapters 6, 8.1 "Run-in period"
and 8.2 "Calibration")
Lower the pH value
(pH 6.5-pH 9.5)
Fill membrane cap with new
electrolyte (see Chapters 6
"Assembly", 8.1 "Run-in period"
and 8.2 "Calibration")
Correctly connect sensor to the
controller (see Chapter 7)
Replace signal lead
Return sensor to ProMinent
Check controller with the sensor
simulator (DULCOMETER
Simulator, order no. 1004042,
return to dealer if faulty)
See Chapter 8.1 "Run-in period"
Examine sample water for
interfering substances and remedy
Carry out zero point calibration
(see Chapter 8.2)
Return sensor to ProMinent for
regeneration
®
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