Xylem ProLab 4000 MULTIPARAMETER BENCHTOP METER - Manual (Page 71)

ProLab 4000 pH
71 ba75646e02 01/2010
7.2.2 Measuring
Stability control The Stability control function checks the stability of the measurement
signal. The stability has a considerable impact on the reproducibility of
measured values. The background color is red until the measured
value is stable. When the measured value is stable, the background
color switches to green.
Regardless of the setting for Autom. stability control (see page 63) in
the System menu, you can start the Stability control function manually
at any time.
1 Perform the preparatory activities (see page 69).
2 Immerse the pH electrode in the test sample.
3 If necessary, select the pH parameter with <MODE>.
1 Highlight the channel of the electrode in the measured value
display.
2 If necessary, switch to the pH parameter with <MODE>.
3 Freeze the measured value with <SC>.
In the status line, [SC] is displayed.
4 With <OK> activate the Stability control function.
As long as the measured value does not meet the stability cri-
terion, the background color is red.
As soon as the measured value is stable, the background color
is green. The current measurement data is downloaded to the
interface. The measured values of all channels meeting the cri-
terion for stability control are marked by SC.