Xylem ProLab 1000 BENCH TOP pH METER - Manual (Page 33)

ProLab 1000 Operation
33 ba75576e04 01/2011
4.5 pH value / ORP voltage
4.5.1 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 and USB interfaces are not galvanically isolated.
Temperature
measurement
For reproducible pH measurements, it is essential to measure the
temperature of the test sample.
You have the following options to measure the temperature:
z Automatic measurement of the temperature by the temperature
sensor (NTC30 or Pt1000) integrated in electrode.
z Measurement by an external temperature sensor.
z Manual determination and input of the temperature.
The display of the temperature indicates the active temperature
measuring mode:
Preparatory activities Perform the following preparatory activities when you want to measure:
Temperature
sensor
Resolution of the
temp. display
Mode
yes 0.1 °C Automatic
with temperature sensor
- 1 °C Manual
1 Connect a pH or ORP electrode to the meter.
2 If necessary, select the pH or mV display with .
3 Adjust the temperature of the solutions and measure the
current temperature if the measurement is made without a
temperature sensor.
4 Calibrate or check the meter with the electrode.