I bought on Amazon SG-02 but they shipped me model SG-03, all looked the same except one issue, whenever i removed the power and re-connected , i had to redial the voltage output. I was using these controllers to provide an input signal to a Variable frequency drive and if the equipment lost its power , with the sg-02 model , upon power up it would go to the previous set output. But not with the sg-03 model, is there anyway where i can have the sg-03 model retain its previous output value upon a power reset to the controller?