Ph Value / Orp Voltage; General Information - wtw pHotoFlex pH Operating Manual

Operation
Temperature
measurement
Preparatory activities
50
4.6

pH value / ORP voltage

4.6.1 General information

You can measure the following variables:
 pH value [ ]
 ORP [mV]
The RS232 interface is not galvanically isolated.
When connecting an earthed PC/printer, measurements cannot be per-
formed in earthed media as incorrect values would result.
For reproducible pH measurements, it is essential to measure the tem-
perature of the test sample.
You have the following possibilities for measuring the temperature:
 Automatic measurement of the temperature by a temperature sen-
sor (NTC30 or Pt1000) integrated in electrode.
 Manual determination and input of the temperature.
The meter recognizes whether a suitable electrode is connected and
automatically switches on the temperature measurement.
The display of the temperature indicates the active temperature mea-
suring mode:
Temperature
sensor
yes
-
Perform the following preparatory activities when you want to measure:
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 mea-
sured parameter, pH or ORP is selected.
4 Adjust the temperature of the solutions and measure the cur-
rent temperature if the measurement is made without a temper-
ature sensor.
5 Calibrate or check the meter with the electrode.
Resolution of the
temp. display
0.1 °C
1 °C
pHotoFlex
Temperature of the test
sample
automatic measurement
manual measurement
and entry
ba75975e05
®
pH
10/2017