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3.5 Lithium cell replacement
In the meter, an integrated CR14250BL-VY lithium cell or equivalent is used for the real-time clock.
The lithium cell should only be replaced by a service company or in the workshop of the power supplying
organization that is authorized to repair and check the meter.
In the meter, it is necessary to remove the seals of the power supplying organization, the service department
and state verification, remove the meter cover, and remove the top meter board from the connector. Solder out the
lithium cell from the board and replace it. To replace the lithium cell, it is necessary to comply with the polarity using
the symbols on the board. CR14250BL-VY lithium cell by EEMB is recommended. The lithium cell should have the
following technical specifications: supply voltage +3.0 V; capacity at least 900 (mA*h); working temperature range
from minus 40 to 85 °C; self-discharge max 1% per year.
After replacing the lithium cell, set the date and time, initialize the electronic seal of the body (see the
САНТ.411152.107-05.1 РП).
In the meter, it is possible to install an additional lithium cell (in case that the integrated cell is discharged) without
opening the meter body. To connect (or replace) it, you must unscrew the cell compartment cover screw and remove
the lithium cell container, solder out the lithium cell (if it was previously installed) and replace it. When replacing
the lithium cell, mind the polarity according to the signs on the cell compartment. Panasonic BR2330 or equivalent
lithium cell is recommended. The lithium cell should have the following technical specifications: supply voltage +3.0 V;
capacity at least 255 (mA*h); working temperature range from minus 40 to 85 °C; self-discharge max 1% per year.
Note – When the meter is off, replacing the lithium cell will stop the clock (the «Attention»
icon is displayed
on the LCD), therefore, after replacing the lithium cell, the current time must be programmed (the «Attention» icon
will disappear).
ATTENTION! When the meter is on, the battery has phase voltage. After replacing the lithium cell, install
the board in its original place, close and seal the meter, and verify it. With each replacement, it is necessary to make
a note in the Data Sheet – who replaced the lithium cell, when and the type of the replacement cell.
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