The SNMP value for the voltage supplied by Mikrotik is multiplied by 10, so the factor to get the actual voltage is 0.1
If I enter 0.1 as the factor I get an “invalid value for factor” error message
Any advice on how to resolve this?
Had opened a Ticket for that a while ago.
Support said that this will be featured in Splynx2.0
In the meantime, I set the unit and label as decivolts, at least then it is technically correct 
On version 2.0 currently factor work as float.
(so it is possible to use 0.1 as factor)