2 measuring the ph value, Measuring the ph value – Xylem HandyLab 680 User Manual
Page 40
Operation
HandyLab 680
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ba77041e01
03/2014
4.7.2
Measuring the pH value
Stability control
(AutoRead )
The stability control function (AutoRead) continually 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.
You can start the Stability control manually at any time, irrespective of
the setting for automatic Stability control (see section 4.4.3) in the Sys-
tem menu.
Note
You can prematurely terminate the Stability control function manually
with at any time. If the Stability control function is pre-
maturely terminated, the current measurement data are output to the
1
Perform the preparatory activities according to section 4.7.1.
2
Immerse the IDS pH sensor in the test sample.
3
Select the pH or mV display with
15.03.2014 08:00
Info
1
Freeze the measured value with
The [HOLD] status indicator is displayed.
2
Using , activate the Stability control function
manually.
The [AR] status indicator appears while the measured value is
assessed as not stable. A progress bar is displayed and the
display of the measured parameter flashes.
The [HOLD][AR] status indicator appears as soon as a stable
measured value is recognized. The progress bar disappears
and the display of the measured parameter stops flashing.
The current measurement data is output to the interface. Mea-
surement data meeting the stability control criterion is marked
by AR.