Calibration Faults; Manually Starting Or Stopping Clo; Manual Operation; Switching Off The System - Grundfos Oxiperm Pro OCD-162 Instrucciones De Instalación Y Programación

10. "CAL result" > [OK]. The "ORP offset value is displayed as the
result (for example 2 mV). This is the deviation between the
entered mV value and the measured mV value of the buffer
solution. The controller corrects the measured ORP value in
the water of the main line by the offset value.
CAL result
ORP offset
-2 mV
11. Remove the ORP electrode from the buffer solution, and rinse
with water.
12. Screw the ORP electrode back into the measuring cell.
13. Open the water supply of the measuring cell.
14. Dispose of the buffer solution. Do not pour it back into the
bottle.
15. Pour the contents of the bucket down the drain.
ORP calibration is completed.
For alternative method, see the operating and installation
instructions for the respective measuring cell.
Enabling and disabling the ORP calibration interval
1. "calibration > ORP > CAL cycle"
2. Select "Off" to disable the interval or select "On" to enable it.
3. If the interval is enabled, enter it in days (1-100).

9.13.4 Calibration faults

1. If, for example, 4.0 pH is selected in the display, but the
electrode is immersed in a 7.00 buffer solution, the following
error message is displayed: "wrong buffer".
– Press [Esc] to terminate calibration, and repeat the process
correctly.
2. If the slope or asymmetry is outside the norm, the following
error message is displayed: "slope error", "error asym. pot.".
This is caused by an old electrode or buffer solution.
Check the expiry date.
– Press [Esc] to terminate calibration, replace the electrode,
and repeat calibration.
3. If the electrode does not send a stable measuring signal to the
controller within 120 seconds, the following error message is
displayed: "calibration time exceeded". This is caused by an
old electrode.
– Press [Esc] to terminate calibration, replace the electrode,
and repeat calibration.

9.14 Manually starting or stopping ClO

1. Press [Man].
– If the controller is switched off in "setup", the message
"Check settings!" is displayed. You cannot access manual
operation.
– If the controller is switched on in "setup", the "Man" LED
lights up, and "manual operation" is ready for use.

manual operation

controller ClO2
dosing flow
2. "controller ClO2" > [OK].
controller ClO2
on
off
"On" starts the dosing and "Off" stops it.
Starting or Stopping the ClO
2
The controller and the dosing pump can be stopped via an
external device, for example a higher-level control system.
Switching off the system at the main switch
The DDA ClO2 pump can be remotely started/stopped using a dry
contact on the pump. See the electrical connections in the pump
operating instructions for details.

9.15 Switching off the system

1. See section
9.3.1 Terminating chlorine dioxide
2. See section Flushing. The dosing pump is switched off
9.5
automatically, as soon as the batch tank is empty.
3. Switch off the Oxiperm Pro at the main switch.
4. Close the dilution water supply.
For restart, see section
9.4 Continuing production after an
interruption.

dosing

2
dosing via an external device
production.
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