LCD/Select Button
4-1
during normal operation – do not use a 3.6V battery. The Mk6 Genius uses a 3.6V
battery. Figure 4-12 shows the fitting of the external battery.
• Figure 4-12 Location of the external battery plugged into PL3
The internal battery is a 3.0V, 700mAh Lithium cell. Only one battery can be used at
one time.
The jumper to enable the internal battery is inside the meter, located between the two
buttons. To use an external battery plug the battery connector into PL3 (the internal
battery jumper does not need to be removed). The external battery is clipped into the
compartment above PL3.
Replacement batteries may be ordered from EDMI separately. A low battery indicator
is displayed on the LCD if the battery is not present or is depleted – the level this occurs
at can be configured. The battery usage life is longer than 10 years on continuous
backup with either of the 700mAh batteries at 25°C. In normal operation the battery
should last for more than 10 years.
To eliminate the possibility of data loss it is best to change the battery while the meter is
running. Care must be taken as the battery is at the potential of the neutral terminal.
The battery is at the potential of the neutral terminal. If conditions (such as wiring
configuration) make this a dangerous operation then steps should be taken to ensure that
it is safe to do so. While the risk of coming into contact with the conductors during a
battery change is minimal, care must be exercised.
LCD/Select Button
The LCD is primarily for displaying information from the meter’s registers for meter
readers. It is also useful during installation, configuration, and diagnosing problems. It
has 8 seven-segment digits to display values and 4 seven-segment digits to display
description (Figure 4-13). It has arrows to indicate import and export for active and
reactive energies, indicators for display sets A and B, battery indicator, currency
The Mk7A Meter 4-13
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