Xylem ProLab 4000 MULTIPARAMETER BENCHTOP METER - Manual (Page 99)

ProLab 4000 Ion concentration
99 ba75646e02 01/2010
9.2.2 Measuring
Temperature for
calibrating and
measuring
For precise ion selective measurements, the temperature difference
between measurement and calibration should not be greater that 2 K.
Therefore, adjust the temperature of the standard and measuring solu-
tions accordingly. If the temperature difference is greater the [TempErr]
warning appears in the measured value display.
Stability control The Stability control function continuously 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.
Regardless of the setting for automatic Autom. stability control (see
page 63) in the System menu, you can start the Stability control func-
tion manually at any time.
1 Perform the preparatory activities according to page 97.
2 Immerse the electrode in the test sample.
1 Highlight the channel of the electrode in the measured value
display.
2 If necessary, switch to the ISE display with <MODE>.
3 Freeze the measured value with <SC>.
In the status line, [SC] is displayed.