B&K Precision 1739 - Manual - Manual (Page 19)

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4.8 Connecting Two Power Supplies in Parallel
Two power supplies may be connected in parallel to double the maximum load
current. In this configuration, the two power supplies will provide 0-30 volt
output at up to 2 amps. Current equalizing resistors must be used as shown in
Figure 9 . However, the protective current limiting feature will prevent damage if
current is temporarily unbalanced during set-up.
When connected in parallel and operating in the constant voltage mode,
determine the total load current limit and preset the current limiting for each
power supply to half the total load current value. Then when the load is
connected, set the voltage controls on the two power supplies for equal voltage
readings. This should also provide approximately equal current from each supply.
Add the two current meter readings together for total load current, or connect
an external ammeter in series with the load.
Figure 9 - Connecting Two Power Supplies in Parallel