wtw pHotoFlex, Operating Manual

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pHotoFlex / pHotoFlex Turb Operation
51 ba75491e05 04/2009
4.6 pH value / ORP voltage
4.6.1 General information
You can measure the following variables:
z
pH value [ ]
z
ORP [mV]
CAUTION
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as incorrect values would result. The
RS232 interface is not galvanically isolated.
Temperature
measurement
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:
z
Automatic measurement of the temperature by a temperature sen-
sor (NTC30 or Pt1000) integrated in electrode.
z
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:
Preparatory activities Perform the following preparatory activities when you want to measure:
Temperature
sensor Resolution of the
temp. display Temperature of the test
sample
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 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.