Xylem ProLab 4000 MULTIPARAMETER BENCHTOP METER - Manual (Page 133)

ProLab 4000 Conductivity
133 ba75646d02 01/2010
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.
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.
Criteria The meter checks the stability of the measured value on the basis of
the temperature measurement. For identical measurement conditions,
the following applies:
1 Highlight the channel of the conductivity measuring cell in the
measured value display.
2 If necessary, select the measured parameter with <MODE>.
3 Freeze the measured value with <SC>.
The display switches to the display of the selected channel as
necessary.
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.
Note
You can terminate prematurely the Stability control function with
<OK> manually at any time. If the Stability control function is termi-
nated prematurely, the current measurement data is not downloaded
to the interface.
5 Using <SC> or <MODE>, release the frozen measured value.
The [SC] status display disappears.
Measured param-
eter Reproducibility Response time
Temperature better than 0.02 °C > 10 seconds