The next set of tests that I have run are 10 minute tests of the regulator with the same loads and power source as the
3 minute tests. I had to switch to a lower-resolution data acquisition device(10-bits, about .2 volts) as the Fluke
Scopemeter software would not allow me to change the 30sec/div display setting and the whole 10 minutes would not have
fit onto the screen.
The new device is a DI-194 Data Acquisition board manufactured by Dataq Instruments, it was a freebie I recieved a long time ago when they
were doing promotions, and although it's not greatest piece of data acquisition hardware around, their free software lets you change the display range.
Before I get to the data, I want to clarify that this is mostly the same setup as the 3 minute test, the only difference is that
I powere a fan up on the bench to cool the regulator heatsink, as well as my load resistors.
As with the 3 minute tests, the regulator maintained the set voltage through the entire duration of the test and with
airflow across the heatsink it barely got warm at all. It does not take very much airflow to keep the regulator cool, but just
a little makes a big difference.