Pr
o
Minent
®
Page 134
8.11.3
DULCOMETER
®
D2C, DULCOTEST
®
CDE Chlorine Dioxide Sensor and
DULCOTEST
®
Sensor PHEP or PHER for pH, Troubleshooting
Controller
Fault
Fault
text
Symbol
Effect
Alarm with ack- Remarks
Remedy
on metering on control
nowledgement
Measured variable 1
Signal exceeded/
pH input
Basic load
Stop
yes
3 mA>signal>23 mA
Check sensor, transducer and
drops below value
-499 mV>signal>499 mV
cable connection
Calibration with error
pH calibration defect
Basic load
Stop
no
Check sensor, clean,
pH
pH
replace if necessary,
recalibrate
if
necessary
Measured variable 2
Signal exceeded/
CD input
Basic load
Stop
no
3 mA>signal>23 mA
Check sensor, transducer and
drops below value
cable connection
Calibration with error
CD calibration defect
Basic load
Stop
no
Check sensor, clean,
ClO
2
ClO
2
replace if necessary,
recalibrate
if
necessary
Limit transgression
pH limit value
no metering
Stop
yes
Function may
after checkout time
CD limit value
be
deactivated
Correcting variable
Signal exceeded/
°C input
Basic load
Stop
yes
Signal ~ 100
Ω
or
drops below value
~138.5
Ω
Operating step
Note text
Symbol
Effect
Alarm with ack- Remarks
Remedy
on metering on control
nowledgement
Stop button
Stop button
no metering
Stop
no
Start unit,
run-on
time
“td”
stops,
shock
dosing
stops
Pause contact
Pause
no metering
Stop
yes, may be
delay time td adjustable,
Deselect pause,
deactivated display elapsing “td”
delay time “td”
Fault sample water
Fault sample water
no metering
Stop
yes
Function switchable
ClO
2
shock dosing
High ClO
2
frequency Stop
no
Function
switchable
adjustable
Base load ClO
2
Base load ClO
2
frequency
no Function
switchable
adjustable
Electronic fault
EEPROM defective
no metering
Stop
yes
send in unit
pH/Chlorine Dioxide
Error message
Condition
Remarks
Calibration ClO
2
not possible!
ClO
2
slope too low
Repeat calibration
Sensor slope too low
(<25% of standard slope)
Calibration ClO
2
not possible!
ClO
2
slope too high
Repeat calibration
Sensor slope too high
(>300% of standard slope)
DPD value too low!
DPD <2 % of measuring
Repeat calibration after
DPD > x.xx ppm
range
addition of chlorine dioxide
Zero point too high
Sensor signal >5 mA
Repeat calibration in
chlorine dioxide-free water
Zero point too low
Sensor signal <3 mA
Check sensor connection
replace sensor, if necessary
Possible
values
Initial value
Increment
Lower value
Upper value
DPD-value
Measured value
0.001 ppm
-0.050 ppm
0.550 ppm
0.01 ppm
-0.20 ppm
2,20 ppm
0.01 ppm
-1.00 ppm
11.00 ppm
0.01 ppm
-2.00 ppm
22 ppm
Zero point
Measured value (mA) –
–
–
BA_DR_002_02_09_GB_Cooling.indd 134
BA_DR_002_02_09_GB_Cooling.indd 134
24.02.2009 11:56:12 Uhr
24.02.2009 11:56:12 Uhr
