3 ph calibration, Ph calibration – Metrohm 781 pH/Ion Meter User Manual
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3.1 pH measurement
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2 Initial configuration
•
Switch on pH/Ion Meter
•
Set dialog language
•
Set date/time
•
Set temperature sensor
3.1.3
pH calibration
1 Start calibration with first buffer
•
Immerse pH electrode in buffer solution pH 7
•
Switch on stirrer with <STIRRER>
•
Start calibration with <CAL>
•
If no temperature sensor is connected:
enter the temperature and exit with <ENTER>
2 Continue calibration with second buffer
•
Remove pH electrode from first buffer, rinse with water and
blot off gently with a lint-free tissue
•
Immerse pH electrode in second buffer solution pH 4 and
continue calibration sequence with <ENTER>
3 Result
•
Wait for potential measurement, result will be displayed:
•
After 30 s the pH/Ion Meter will switch back automatically to
the measurement display. This can also be done immediately
with <ENTER>.
CONFIG
CAL
ON/OFF
ENTER
ENTER