Metrohm 780 - Calibrating the Fluoride ISE

3.2 Determination of an ion concentration (only 781: Conc mode)
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780/781 pH/Ion Meter, Manual
1 pH/Ion Meter installation
• Set up instrument Section 2.1
• Connect stirrer Section 2.3.1
• Connect electrodes Section 2.4
• Mains connection Section 2.5
2 Initial configuration
• Switch on pH/Ion Meter Section 5.4
• Set dialog language Section 5.4
• Set date/time Section 5.4
• Set temperature sensor Section 5.4
3.2.3 Calibrating the fluoride ISE
1 Set method parameters in the Conc mode
• Press
<MODE>
to enter the Conc mode
• In the ion parameters (
<PARAM>
) set the concentration unit
to
ppm
with
<SELECT>
:
• In the calibration parameters set the number of standards to
5
and define the concentrations:
CONFI G
ON/ OFF
MODE
PARAM
PARAMETER Conc
> calibration parameters
no. of standards 5
addition: manual
conc.1 0.5 ppm
conc.2 2.5 ppm
conc.3 5.0 ppm
conc.4 25.0 ppm
conc.5 50.0 ppm
PARAMETER Conc
> ion parameters
conc.unit: ppm