A reference value has not been provided by the manufacturer where the corresponding table cannot be found out, the method recommended is to find it out by yourself. The conductivity value is determined by the importance of the same instrument technology as defined later in the field.
This results in achieving comparable results. Conductivity measurement is the most reliable method that is approximately 90 days after initial installation in the online mode. The maximum capacity is shown by the battery itself where it is not possible due to conductivity measurement that is not recommended before a capacity test and after the battery has been recharged fully.
Source:- Elektrotechnik.vogel