The model 341A provides DC voltages of 0 to 1100 volts in three ranges. Voltages are selected by eleven-position decade switches, which provide in-line, digital readout of the instrument output voltage. It employs six-dial readout, with 1 ppm resolution. Meets original manufactures specs. Accuracy of Output 10V Range +/- 0.01% of setting or +/-0.0003% of Range 100V Range +/- 0.01% of setting or +/-0.0002% of Range 1000V Range =/-0.01% of setting or +/- 0.0002% of Range