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Time-back correction is carried out by seconds if it does not exceed 29 seconds. Time-forward correction is
performed by setting the value of 59 if the current value of seconds was 30 and more.
So to obtain the correct result, correction should be done at zero minutes of the exact time, provided that
the difference between the exact time and the meter time clock does not exceed 29 seconds. Also it should be
considered that the correction is done of about a second after pressing the button.
4.4.3 Optical interface activation
Long push of the «FRAME» button in meters with EIA-485 interface swithes data exchange to optical port with
displaying on the LCD of «0Pt0XX» where ХХ is a countdown of optical port activity in seconds. Short press of the
«FRAME» button switches to the EIA-485 interface.
4.4.4 LCD test mode. All LCD segments switch on.
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