Operation
pHotoFlex
®
Turb
46
ba75976e07
09/2021
4.6
pH value / ORP voltage
4.6.1 General information
You can measure the following parameters:
pH value [ ]
ORP [mV]
Temperature mea-
surement
For reproducible pH measurements, it is essential to measure the tempera-
ture of the test sample.
You have the following options to measure the temperature:
Automatic measurement of the temperature by a temperature sensor
(NTC30 or Pt1000) integrated in electrode.
Manual determination and input of the temperature.
The measuring instrument recognizes whether a suitable electrode is con-
nected and automatically switches on the temperature measurement.
The display of the temperature indicates the active temperature measuring
mode:
Preparatory activi-
ties
Perform the following preparatory activities when you want to measure:
The RS232 interface is not galvanically isolated.
When connecting an earthed PC/printer, measurements cannot
be performed in earthed media as incorrect values would result!
Temperature
sensor
Resolution of the
temp. display
Temperature of the measuring
medium
yes
0.1 °C
Automatic measurement
-
1 °C
Manual measurement and entry
1 Connect a pH or ORP electrode to the meter.
2 Press the
<M>
key (long pressure) repeatedly until the
pH & ORP
measuring mode is selected.
3 Press the
<M>
key (short pressure) repeatedly until the measured
parameter,
pH
or
ORP
is selected.
4 Adjust the temperature of the solutions and measure the current tem-
perature if the measurement is made without a temperature sensor.
5 Calibrate or check the meter with the electrode.
