Water Monitoring System
User Manual
Page
82
of 82
Ver. 1.1 – Revision March 2022
System type
Water monitoring system
MI6200-0013
Task:
pH Sensor Replacement
Task description:
This instruction describes how to replace the pH sensor. The pH sensor
may only be replaced by a trained technician.
Difficulty 1-5
Overhaul interval
Estimated time consumption
As necessary
5 min.
Spare Parts
Tools
Part no:
Description:
Item:
02344
pH sensor without electrode
Small flat headed screwdriver
17-19 mm Spanner
Procedure
1. Turn OFF the WMS by turning the MAIN SWITCH on the right side
of cabinet to “O” position.
2. Close the INLET VALVE and OUTLET VALVE. Note: In case of
motor valve, turn the handle on the bottom of the motor valve to
enable manual open/close the valve.
3. Open the DRAIN VALVE.
4. Loosen the pH sensor and observe the water draining out of the
cabinet.
5. Uninstall the old pH sensor using a small flat headed screwdriver
to disconnect the pH sensor wiring inside the monitoring unit. Use
the 17–19 mm spanner to loosen the cable gland, then pull out the
cable. (Take photos or notes of the existing pH sensor wiring. This
will make it easy to install the replacement sensor.)
6. Unscrew the grey nut on the pH sensor and pull up the sensor
from the measuring chamber.
7. Install the replacement pH sensor in the same way the old was
installed or in accordance with the electrical drawing.
8. Check that water is inside the measuring chamber. Make sure the
flat gasket is in place and tighten the grey nut.
9. Close the DRAIN VALVE. Open the INLET VALVE and OUTLET
VALVE.
10. Power ON the system.
ATTENTION:
The new pH sensor requires a functioning pH electrode. A
new pH electrode can be used or the existing electrode can
be taken from the replaced pH sensor and used in the new
pH sensor.
To replace the pH electrode, follow the instructions MI6200-
0007 – pH Electrode replacement.
Photos
MI6200-0013
