wtw inoLab pH/ION Level 2 Operating Manual page 30

Operation
Preparatory
activities
Temperature probe
114
4.4 Measuring the ISE concentration
Perform the following preparatory activities when you want
to measure the concentration using an ion sensitive elec-
trode:
1 Connect the electrode to the instrument.
2 Adjust the temperature of the test solutions or mea-
sure the current temperature if the measurement is
made without a temperature probe.
3 Select the ISE measuring mode by pressing
4 Calibrate or check the instrument with the electrode.
Note
Incorrect calibration of the ion sensitive electrode will result
in incorrect measured values. Therefore, regularly perform
calibration before measuring.
Measurements can be performed with and without a temper-
ature probe. A connected temperature probe is indicated by
TP on the display.
Note
The meter automatically recognizes the type of the temper-
ature probe used. As a result, you can connect electrodes
with the NTC30 or Pt1000.
The temperature measurement is absolutely essential for a
reproducible measurement. If the measurement is made
without a temperature probe, proceed as follows:
1 Measure the current temperature.
2 Temper the test sample and the calibration standards
to the same temperature (in the range
Note
It is not possible to enter temperature values manually for
ISE measurements and calibration.
m
.
.
± 2 °C)