Metrohm 780 - Page 35

3 Short operating tutorial
780/781 pH/Ion Meter, Manual
25
2 Start calibration with first standard
• Immerse electrodes in the standard with the lowest F
-
concen-
tration
• Start calibration with
<CAL>
• If no temperature sensor is connected:
enter the temperature and exit with
<ENTER>
• Confirm standard concentration with
<ENTER>
or – if neces-
sary– correct it
• Wait for measurement of the potential
3 Continue calibration with increasing standard con-
centrations
• When the request 'Change std.
<ENTER>
' appears, remove
the electrodes from the first standard, rinse them with water
and blot them gently with a clean lint-free tissue
• Immerse electrodes in the next standard and continue the cal-
ibration sequence with
<ENTER>
• In each case conform the standard concentration with
<ENTER>
or – if necessary – correct it
• Repeat procedure for each remaining standard
4 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>
.
CAL
ENTER
ENTER