Slew rate
The slew rate for each DC load varies from model to model. The variations are also dependent on
the different regions measured for each individual load. In general, the slew rate for low current
transitions, say 0 to 0.5 A, is significantly lower than slew rate for current transitions from 30 to 70 A.
The provided table below indicates measured slew rates based on the maximum range of current
transition of the models are capable of. For example, model 8500's slew rate would be measured
with current transition from 0 A to 30 A.
Note: The graph below illustrates slew rate measurements. In general, the indicated slew rates in
the table below are measured based on the maximum current range each model is able to handle.
Between the 10% and 90% region, the slew rate can be measured by observing the steepest slope
portion. The indicated measured time would be used to calculate the slew rate. Hence, the slew
rate calculation is simply (rated max. current – 0 A) / T, where T is the measured time from 10% to
90% region and rated max. current is the specified maximum current of each load.
8500 DC Load Series Version: February 4, 2009 Page 19 of 76
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