22
User Manual S200 WCS
Update August 2021
6 . 4 . 1 C a l i b r a t i o n p r o c e s s w i t h b u f f e r s o l u t i o n f o r p H p ro b e
Buffer solutions, such as pH 4. and pH 7, must be ready for the calibration.
1. If the pH probe is used for control, the S200 control must be switched off before
removing the pH probe.
2. Temperature compensation - adjust according to the temperature of the buffer
solution.
3. Remove the pH probe.
Note:
To remove the probe, the plug-in connection of the pH probe must be
disconnected. It is important to ensure that no moisture can penetrate into the plug-in
connection
.
4. Dry the pH probe with a soft paper towel before calibrating it.
5. Select the menu
“Calibrate pH” as shown above.
6. Immerse the probe in the first buffer solution, for example pH 7.
Note:
The probe must be immersed deep enough so that the diaphragm (small round
dot on the glass shaft) is also immersed in the buffer solution.
7. The buffer solution recognized by the S200 is indicated in the display.
Observe the display of the pH value until the value has stabilized.
8.
- Press and hold the key. Press
in addition
to activate the calibration of the pH probe.
9. Rinse the probe with water and dry it with a soft paper towel.
10. Immerse the probe in the second buffer solution pH 4.
Note:
The probe must be immersed deep enough so that the diaphragm (small round
dot on the glass shaft) is also immersed in the buffer solution.
11. The buffer solution recognized by the S200 is indicated in the display.
Observe the display of the pH value until the value has stabilized.
12.
- Press and hold the key. Press
in addition
to activate the calibration of the pH probe.
13. Rinse the probe with water and dry it with a soft paper towel.
14. Install the pH-probe.
Adjust the temperature compensation back to the original value.
If the control was turned off, turn it on again.
Note:
The S200 recalculates the probe of the slope and the zero point deviation after each
calibration.
