Hello All,
My 6012B variable power supply has been reading a "negative current display" when the unit is turned on, even though the current pot is turned fully CCW to zero. If I adjust the "voltage pot" to say 12 volts, but the current pot stays at zero, and short the output leads, there is a fairly hefty spark, like there is current flowing, but there should not be.? If I depress the "display settings" button and adjust the current to say 5 amps, then release the button, the display will still read a negative number.
Putting a 5 amp load on the power supply still displays a negative number.
Has anybody had this problem and if so, what was done to correct the problem.? What area of the schematic should I be looking into?
Thank you,
--jeff
