Xylem ProLab 1000 BENCH TOP pH METER - Manual (Page 36)

Operation ProLab 1000
36 ba75576e04 01/2011
4.5.3 Measuring the ORP
Note
ORP electrodes are not calibrated. However, you can check ORP
electrodes using a test solution.
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 display of the measured parameter flashes until
a stable measured value is available.
Independent of the setting for automatic Stability control (see page 32)
in the System menu, you can start the Stability control function
manually at any time.
Note
You can terminate prematurely the Stability control function with
<MENU/OK> manually at any time. If the Stability control function is
terminated prematurely, the current measurement data is not
downloaded to the interface.
1 Perform the preparatory activities (see page 33).
2 Immerse the ORP electrode in the test sample.
3 Select the mV display with <MODE>.
U
157.0
mV
24.8
°C
26.04.06 10:37
1 If necessary, select the displayed measured value with
<MODE>.
2 Freeze the measured value with <SC>.
In the status line, [SC] is displayed.
3 With <MENU/OK> activate the Stability control function.
[SC] flashes while the stability control is active.
As soon as a stable measured value is recognized, the current
measurement data is downloaded to the interface.
Measurement data meeting the criterion for stability control is
marked by SC.