Operation
pH 3310
30
ba75802e02
12/2008
4.4.3
Measuring the ORP
Note
ORP electrodes are not calibrated. However, you can check ORP
electrodes using a test solution.
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 page 26) in the
System
menu.
Note
You can prematurely terminate the
Stability control
function manually
with
<ENTER>
at any time. If the
Stability control
function is
1
Perform the preparatory activities according to section 4.4.1.
2
Submerse the ORP electrode in the sample.
3
Select the mV display with
<M>
.
U
157.0
mV
24.8 °C
22.09.2008
08:00
Menu
USB output
1
Freeze the measured value with
<AR>
.
The [HOLD] status indicator is displayed.
2
Using
<ENTER>
, activate the
Stability control
function
manually.
The [AR] status indicator appears while the measured value is
assessed as not stable.
The [HOLD][AR] status indicator appears as soon as a stable
measured value is recognized. The current measurement data
are output to the interface.
Measurement data meeting the stability control criterion are
marked by AR.
