47
9 Maintenance
✱
Press the
key to stop reading the calibration data.
9.2
Real-time clock ("CLOC")
The real-time clock is required for the chronological assignment of the calibra-
tion. You should therefore check the settings as required, particularly after
replacing the battery.
The date of the last calibration is shown in the main display.
The time of the last calibration is shown in the subsidiary dis-
play.
1
With the 1 point calibration, the acidic slope = the alkaline slope = -59.16 mV/pH is assumed.
With the 2 point calibration, the acidic slope = the alkaline slope.
With the 3 point calibration, independent acidic and alkaline values are determined.
rH
mV
mV
H
pH
ATC
ok
AL Logg
pH
CAL
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