5-3 mV Measurement
The instrument build in mV ( millivolt ) measurement
function, which enable you to make ion-selective, ORP
(oxidation-reduction potential), and other precise mV
measurements.
1)Prepare the ORP Electrode ( optional, ORP-14 ), install
the " Probe Plug " of ORP electrode into the " pH
Socket/BNC Socket " ( 3-11, Fig. 1 ).
2)Power on the meter by pressing " Power Button "
( 3-2, Fig. 1 ) once.
Select the measurement mode to " pH, mV ( ORP )
measurement ". refer chapter 4, page 11 .
Pressing the " Function Button " ( 3-6, Fig. 1 )
once until the Display show " mV " indicator.
3)The up main display will show the mV value.
5-4 pH calibration
Calibration Consideration
The most ideal pH ELECTRODE generates 0 mV at pH
7.00 ( 177.4 mV at pH 4 ) and meter has been always
calibrated with signals which simulate the most ideal pH
ELECTRODE ( based on 25 ambient environment ).
℃
However not every pH ELECTRODE is as accurate as the
most ideal one, so calibration procedures are necessary
to be done before the first time measurement.
In addition to the first time measurement, users are also
recommended to execute the calibration procedures to
ensure the high accuracy measurement.
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