inoLab pH/ION 735
Operation
23
4.4
pH value / ORP voltage
4.4.1
General information
You can measure the following variables:
!
pH value [ ]
!
ORP [mV]
Warning
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 measure-
ment
For reproducible pH measurements, it is essential to measure the tem-
perature of the test sample.
You have the following possibilities of measuring the temperature:
!
Automatic measurement of the temperature by the temperature sen-
sor (NTC30 or Pt1000) integrated in electrode.
!
Measurement by an external temperature sensor.
!
Manual determination and input of the temperature.
The display of the temperature indicates the active temperature mea-
suring mode:
Temperature
sensor
Resolution
of the temp.
display
Mode
yes
0.1 °C
Automatic with pH tem-
perature sensor
-
1 °C
Manual