Control panel - upper.
selector perform a wide variety of voltage monitoring functions (fig 5). The two
scale meter reads out 0-10, 0-20, and 0-50 volts, dependent on the positioning of
the range selector. Circuit selection is controlled by the circuit selector switch
which has four positions.
(1) The "RECT GEN" position connects the metering circuit to +G and G
generator binding posts (fig 6) when testing DC systems. When testing AC/DC
systems the metering circuits are connected to the -D and +G rectifier input output
OS 010, 3-P6