Yes it is a false reading. You generally need some thing added to the tank to generate ammonia. The simplest way is to add a piece of shrimp from the store to the tank. As the shrimp decades it will cause ammonia to rise in the tank and your bacteria will start to grow.
Agreed if nothing is in tank to start cycle.. then I would either ghost feed the tank or throw a chunk of raw shrimp in... then in a week or 2..start checking again..