20 June 2022
PM5000 Series Meter have internal RTC (Real Time Clock).
The internal battery in the meter keeps its clock running and helps maintain the time even when the meter is powered down.
Battery back-up time - 3 years without control power
The life expectancy of the meter’s internal battery is estimated to be over 10 years at 25 °C under typical operating conditions.
Refer to user manual (Meter Battery) page 188 and 208.https://www.se.com/au/en/download/document/HRB1684301/