41
Pr
o
Minent
®
Fault
Possible Cause
Remedy
Sensor can not be calibrated.
1) Run-in time too short
See Chapter 8.1 “Run-in period”
Measured value
lower
than
2) Deposits on membrane cap
Replace membrane cap (see
DPD-measurement
Chapters 6, 8.1 “Run-in period”
and 8.2 “Calibration”)
3) Flow rate of sample water too low
Correct flow rate (see Chapter 14,
“Technical data”)
4) Air bubbles on the outside of the
Increase the flow rate within the
membrane
permitted range
5) Interfering substances in sample
Confer with ProMinent
water (surfactants, oil, alcohols,
corrosion inhibitors)
6) Value substantially exceeds
Replace membrane cap (see
measurement range
Chapters 6, 8.1 “Run-in period”
and 8.2 “Calibration”)
7) Deposits (carbonate, manganese,
Replace membrane cap (see
iron oxide) have blocked
Chapters 6, 8.1 “Run-in period”
membrane
and 8.2 “Calibration”)
8) pH-value > pH 9.5
Lower the pH value
(pH 6.5-pH 9.5)
9) No electrolyte present in
Fill membrane cap with new
membrane cap
electrolyte (see Chapters 6
“Assembly”, 8.1 “Run-in period”
and 8.2 “Calibration”)
Measured value of sensor
1) Sensor is connected to controller
Correctly connect sensor to the
is 0 ppm and error message
with wrong polarity
controller (see Chapter 7)
“Check Chlorine Input”
2) Signal lead is broken
Replace signal lead
appears on
3) Sensor defective
Return sensor to ProMinent
DULCOMETER
®
D1C display
4) Controller defective
Check controller with the sensor
simulator (DULCOMETER
®
Simulator, order no. 1004042,
return to dealer if faulty)
Measured value of sensor
1) Run-in time too short
See Chapter 8.1 “Run-in period”
is 0 ppm and sensor current
2) Interfering substances which
Examine sample water for
is 3.0 - 4.0 mA
consume chlorine
interfering substances and remedy
3) Zero point has shifted
Carry out zero point calibration
(see Chapter 8.2)
4) Reference electrode defective*
Return sensor to ProMinent for
regeneration
Troubleshooting
BA_DT_106_12_09_4spr.p65
15.12.2009, 10:26 Uhr
41
