7. Select pH Calibration (
→
→→
→ F1:Calibrate →
→→
→ F1:pH
).
The display should now look something like this…
6*76pH 6.87
25.0
O
C Buffer
Press Enter to Cal.
or Edit Buffer.
The current pH reading is shown on the left. A “
∗
∗∗
∗
” in place of the decimal point indicates that
pH is currently not calibrated.
The buffer that the smartCHEM-Titro has attempted to recognise is also displayed with the
correct value at the current temperature.
8. Press to calibrate to the displayed buffer. Otherwise, enter an alternative buffer using the
Numeric Keypad, and then press . The Automatic Stability Function will now show a
and highlight any unstable readings…
6.85pH 6.87
25.0
O
C
Buffer
Waiting to Stabilise
When the pH and Temperature readings have stabilised, the unit will calibrate itself.
To calibrate immediately without waiting for complete stability, press to disable the
Automatic Stability Function.
9. The meter is now 1 point calibrated. Note that a “
∗
∗∗
∗
” will not be removed until a 2 point
calibration has been performed. Rinse the pH and Temperature sensors in distilled water and
blot them dry.
10. Repeat steps 6 to 8 in a second buffer to perform a 2 point calibration. See section 4.3.2 for
details on the correct sequence of buffers to ensure the instrument is correctly calibrated at the
2 points. If a “
∗
∗∗
∗
” was shown in place of the decimal point, this will be removed after a
successful 2 point calibration.
11. Repeat steps 6 to 8 in a third buffer to perform a 3 point calibration, if required. See section
4.3.3 for details on the correct sequence of buffers to ensure the instrument is correctly
calibrated at the 3 points.
12. The smartCHEM-Titro is now calibrated for pH and is ready for use in this mode. Discard the
used samples of buffer.
Rinse the pH and Temperature sensors in distilled water and blot them dry before placing them
into unknown samples.
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