ECOTEST DKG-21 Operating Manual page 48

4.3.3.8 Indication and correction of real time
Press shortly the MODE button to enter this mode from any other mode
of operation. This mode follows the mode of DE measurement indication.
It is indicated by a one-second blinking ":" symbol between the two
pairs of the dLCD digits.
The digits from the right to the left show the following: the first digit
indicates minutes; the second one - tens of minutes; the third one - hours;
the fourth one - tens of hours.
Press the THRESHOLD button and hold it down until the two digits to
the right from the ":" symbol start blinking to correct the value of real time.
Release the button afterwards. The proper values of units and tens of minutes
are fixed by further pressing and holding the THRESHOLD button. The
minutes can also be corrected by shortly pressing the THRESHOLD button.
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