Cortex Series RTC Battery

Davicom’s Cortex units use a Lithium battery to power their Real Time Clock (RTC) circuit. The recommended battery is the BR2032 which has a wider temperature range than the regular CR2032 batteries. However, a CR2032 can be used if a BR2032 type is not available.

Battery life is normally good for up to 10 years, but we recommend replacement after 5 to 8 years. Note that the battery only powers the Real-Time-Clock (RTC) circuit in the Cortex, all other settings, configurations and workspaces are stored in Non-Volatile Memory.

The following procedure should be followed to change the battery. 

BR2032 battery install/replacement procedure for Cortex units

  1. Power off the Cortex unit and remove from equipment rack if necessary.
  2. Remove top cover.
  3. Gently slide the new (or replacement) battery in the battery holder. Observe the proper polarity.
  4. Apply power and let the Cortex boot-up (about one minute or until Activity LED starts blinking). Wait another minute to allow the RTC circuit to start-up normally.
  5. At this point, if desired, you can manually set the time and date in the Cortex, or perform a time synchronization if connected to an NTP server.
  6. If you are returning the unit to storage, you can remove power and re-install the top cover after the ~2 minute wait.
  7. If the unit is to be used immediately, simply re-install the top cover and re-mount the unit in its rack.

The procedure requires that the unit be powered-up as soon as possible after installing the battery, thus allowing the RTC to configure itself properly in low-power mode.   The unit can then be powered down, otherwise the battery will drain if it is initially installed in an unpowered unit.

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