ProMinent CTE 1-mA Instrucciones De Servicio página 41

Fault
Sensor can not be calibrated. 1) Run-in time too short
Measured value lower than
DPD-measurement
Measured value of sensor
is 0 ppm and error message
"Check Chlorine Input"
appears on
DULCOMETER ® D1C display
Measured value of sensor
is 0 ppm and sensor current
is 3.0 - 4.0 mA
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ProMinent
Possible Cause
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) Value substantially exceeds
measurement range
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 which
consume chlorine
3) Zero point has shifted
4) Reference electrode defective*
Troubleshooting
Remedy
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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