Ph Readjustment - HACH LANGE si629 P Manual De Uso

4. Operation

4.10. pH readjustment

The si629 P allows to readjust the pH measured value by modifying the reading that appears on the display.
Previously the pH of the sample must be measured with a perfectly calibrated instrument.
During the readjustment the si629 P behaves as if it was calibrated with only one buffer. Hence only the
asymmetry potential is modified maintaining the previous slope.
Every time the si629 P is calibrated in the conventional manner the readjustments will be lost.
si629 P_HACH_LANGE_Ed.0510.indd ANG:23 si629 P_HACH_LANGE_Ed.0510.indd ANG:23
M E A S U R E
pH 4.00 25.0 °C
Press during more than 3 sec.
READJUST pH
pH 4.00 25.0°C
or
READJUST pH
pH 4.12 25.0°C
SLOPE
XX.XX mV/pH
ASYM. POTENTIAL
X mV
CALIBRATION OK
M E A S U R E
pH 4.12 25.0 °C
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