Ph Value / Orp Voltage; General Information - wtw Avantor VWR pH 1100 L Operating Manual

Operation
Temperature
measurement
Preparatory activities
28
5.4

pH value / ORP voltage

5.4.1 General information

You can measure the following parameters:
 pH value [ ]
 ORP [mV]
Attention
When a grounded PC is connected, measurements cannot be per-
formed in grounded media as incorrect values would result.
The USB-A (Device) is not galvanically isolated.
For reproducible pH measurements, it is essential to measure the tem-
perature of the test sample.
You have the following options to measure 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 measuring instrument recognizes whether a suitable sensor is
connected and automatically switches on the temperature measure-
ment.
The display of the temperature indicates the active temperature mea-
suring mode:
Temperature Resolution of the
sensor temp. display
yes 0.1 °C
- 1 °C
Perform the following preparatory activities when you want to measure:
1 Connect a pH or ORP electrode to the meter.
The pH measuring window is displayed.
2 If necessary, select the pH or mV display with
3 Adjust the temperature of the solutions and measure the cur-
rent temperature if the measurement is made without a tem-
perature sensor.
4 Calibrate or check the meter with the electrode.
pH 1100 L
Mode
Automatic with temperature
sensor
Manual
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05/2021