3 measuring the orp, Measuring the orp – Xylem ProLab 2000 User Manual
Page 39
ProLab 2000
Operation
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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 35)
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
manually at any time. If the Stability control function is
terminated prematurely, the current measurement data is not
1
Perform the preparatory activities (see page 36).
2
Immerse the ORP electrode in the test sample.
3
Select the mV display with
U
157.0
mV
24.8
°C
26.04.06 10:37
1
If necessary, select a channel (measured value) with <
▲><▼>.
2
Freeze the measured value with
The display switches to the display of the selected channel as
necessary.
In the status line, [SC] is displayed.
3
With 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. The
measured values of all channels meeting the criterion for
stability control are marked by SC.