Pr
o
Minent
®
Page 99
Total Chlorine
Fault
Possible Cause
Remedy
* When the reference electrode turns shiny silver or white it must be regenerated.
Brown-grey or yellow green coloration is normal.
** The DULCOMETER
®
D1C can be used to display the sensor current when the sensor is built into the
system.
For this enter the complete operating menu (see Operating Instructions DULCOMETER
®
D1C, Chlorine,
Chapter 8). Access the “Calibrating chlorine” settings menu and only read the mA-value measured under
“Zero point”. Do not fi nish the zero point calibration but leave the menu by pushing the branch back
button.
Measured value of
sensor is 0 ppm and
error message
“Check Cl input”
appears on
DULCOMETER
®
D1C
display
Measured value of
sensor is 0 ppm and
sensor current
is 3.0 - 4.0 mA
Measured value of
sensor is arbitrary and
sensor current is
greater
than 20 mA**
Measured value of
sensor is not stable
Sensor is connected to controller
with wrong polarity
Signal lead is broken
Sensor defective
Controller defective
Run-in time too short
Interfering substances which
consume chlorine
Zero point has shifted
Reference electrode defective*
Chlorine concentration exceeds
the upper limit of measuring
range
Distance between working
electrode and membrane too
great
Sensor defective
Pressure fl uctuations in
sampling line
Reference electrode defective*
Correctly connect sensor to the
controller
Replace signal lead
Return sensor to ProMinent
Check controller with the sensor
simulator (DULCOMETER
®
Simulator, order no. 1004042,
return to dealer if faulty)
See “Run-in period”
Examine sample water for inter-
fering substances and remedy
Carry out zero point calibration
Return sensor to ProMinent for
regeneration
Check the whole system,
remedy fault and then calibrate
sensor
Screw the membrane cup
tightly onto the electrode shaft
Return sensor to ProMinent
Check installation position and
change the process if necessary
Return sensor to ProMinent for
regeneration
BA_DR_002_02_09_GB_Cooling.indd 99
BA_DR_002_02_09_GB_Cooling.indd 99
24.02.2009 11:56:09 Uhr
24.02.2009 11:56:09 Uhr