How often is it required to preform battery conductance tests on emergency power supply systems?

At a minimum, Conductance testing is required monthly on sealed batteries (per NFPA 110).

For additional maintenance needs see a possible schedule below:

Check the electrolyte level weekly

Charger and charge rate, equalize charge inspection, and specific gravity and conductance testing is all done on a monthly basis.

Every quarter the terminals need to be cleaned and tightened.

For a more thorough schedule please refer to the EPSS maintenance schedule in Annex A of NFPA 110.