Validation & Calibration
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45
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NOTICE
Validation procedure uses pH buffer 7.
Calibration procedure uses pH buffer 4, 7 & 10.
1. Select “Local” and “Stopped” on the HMI. Close the “Outlet” and “Inlet”
valves. If the system is equipped with at motor valve, the valve will close
when “stopped” is selected.
Figure 7.4: Valves
2. Open the “Drain” valve.
3. Find a clean cloth and pH buffer 7.
4. Loosen the pH sensor union nut by hand and remove the sensor from its
measuring chamber.
5.
Clean
the electrode and check if the measuring chamber needs
cleaning. Note that the chamber is designed to retain water to keep the
tip of the electrode moist. This means there will be a small amount of
water present. This is normal and the service user must remember to
ensure that it is filled with water again after calibration.
6. Go to “Settings” menu. Login. Select “G6130 pH” and Select “Validation”.
