B&K Precision 8500-8526 - Manual - Manual (Page 19)

The curved portion is where the dissipated power is at the rated power of the instrument (and is
actually a hyperbolic shape). When you use the menu to set lower-than-maximum power or current,
the operating region may look like the following:
Note the gap between the operating region and the current axis for lower voltages. More detail is
described in the following section.
Low Voltage Characteristics
The following graphs show the voltage/current relationships for low voltages:
8500 DC Load Series Version: 030614 Page 19 of 77