B&K Precision 1730A - Manual - Manual (Page 5)

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INTRODUCTION
The B+K Precision Model 1710A and 1730A DC Power Supplies are high quality, ge neral purpose dc power sources. The two models
are very similar to each other, and both are covered in this instruction manual. Each of these power supplies provides 0-30 volts dc
output, adjustable with both coarse and fine controls for precise settability. The current output of the Model 1710A is 0-1 amp, while
Model 1730A is 0-3 amps. Two current ranges, High and Low, provide excellent current settability and meter resolution. Two large
panel-mounted meters continuously monitor the output voltage and cu rrent.
These power supplies exhibit excellent regulation and low ripple characteristics. The circuit design incorporates a pre-regulator, which
greatly reduces internal power dissipation at low output voltages. The styling is both attractive and functional. The mechanical
configuration conserves bench space and allows for easy portability.
These instrument may be used in constant voltage or constant current applications. The crossover from constant voltage to constant
current modes is smooth and automatic. LEDs indicate the “CV” (constant voltage) or “CC” (constant current) mode of operation. In
constant voltage applications, a current limit may be preset. When load variations cause the current to reach the preset limit, the unit then
regulates output current rather than output voltage. Current limits are adjustable from 5% to 100% of maximum. In constant current
applications, the maxi mum voltage may be preset. When load variations cause current to drop below the regulated value, the unit reverts
to regul ated voltage operation at the preset value.
Reverse polarity protection prevents accidental damage to the power supply from improper connection to an external voltage, and
current limiting protects the equipment being powered, as well as the power supply.
The output is isolated from chassis and earth ground, which permits full flexibility of connections. When needed, the (+) or (-) polarity
may be strapped to ground, or either polarity may be floated to an external voltage. Two supplies may be connected in series as a 0 -to-60
volt power source, or two supplies may be connected in parallel, with suitable balancing resistors, for up to twice the output current.
These power supplies are well suited for a wide variety of electrical and electronics applications, including service shops, engineering
labs, pro duction testing, school laboratories, and home use by hobbyists.