Xylem ProLab 4000 MULTIPARAMETER BENCHTOP METER - Manual (Page 79)

ProLab 4000 pH
79 ba75646e02 01/2010
7.3.1 Carrying out a calibration procedure
(example: AutoCal DIN)
Make sure the Calibration / pH calibration type / Buffer sets setting is
selected correctly and the AutoCal calibration type is marked (see
page 73).
Use any one to five buffer solutions of the selected buffer set.
The DIN calibration is described below. With other buffer sets, other
nominal buffer values are displayed. Apart from that, the procedure is
identical.
1 Perform the preparatory activities (see page 78).
2 Start the calibration with <CAL>.
The pHX calibration window opens.
3 If necessary, check whether the displayed buffer set agrees
with the used buffer set.
4 When measuring without temperature sensor:
z Measure the temperature of the standard solution using a
thermometer.
z Open the setting window for the temperature value with
[Man. temp.].
z Enter the temperature and confirm with [OK].
5 Thoroughly rinse the electrode with distilled water.
6 Immerse the electrode in buffer solution 1.
7 Start the measurement with [Continue].
The measured value is checked for stability (Stability control).