Decommissioning - ProMinent DULCOTEST CLT 1 Serie Instrucciones De Servicio

Fault
Measured value of sensor
is not stable
* When the reference electrode turns shiny silver or white it must be regenerated. Brown-grey or yellow green
coloration is normal.
®
** The DULCOMETER
For this enter the complete operating menu (see Operating Instructions DULCOMETER
Access the "Calibrating Clt" settings menu and only read the mA-value measured under "Zero point". Do
not finish the zero point calibration but leave the menu by pushing the branch back button.

11 Decommissioning

CAUTION
• Switch off secondary control systems or switch them to manual
• Depressurise the system before dismantling the sensor. Close the stop
• In case of an emergency, first disconnect the controller from the
• Before opening the DGM/DLGIII observe on-site safety guidelines.
• Additionally follow all of the safety instructions in Chapter 6 "Assem-
Decommissioning
sensor
®
ProMinent
Possible Cause
2) Distance between working
electrode and membrane too great
3) Sensor defective
1) Pressure fluctuations in sampling
line
2) Reference electrode defective*
D1C can be used to display the sensor current when the sensor is built into the system.
operation before dismantling the sensor. A defective sensor results in
an incorrect measured value, which may cause dangerous overdosing
within a control system.
valves before and after the in-line probe housing. Liquid will leak out
when the sensor is dismantled under pressure.
power supply. If liquid leaks out from the in-line probe housing (DGM/
DLGIII), close the stop valves at the inlet and outlet of the sample
water.
bly".
Disconnect the sensor electrically (compare Chapter 7, "Installation").
Depressurise the in-line probe housing.
Screw off the plug of the in-line probe housing.
Slowly pull out the sensor from the in-line probe housing.
Troubleshooting / Decommissioning
Action
Screw the membrane cup tightly
onto the electrode shaft, so that
no gap can be seen anymore
Return sensor to ProMinent
Check installation position and
change the process if necessary
Return sensor to ProMinent for
regeneration
®
D1C, Chapter 8).
41