PASCO PI-9880 Power Supply - Manual (Page 34)

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D C P r o g r a m m a b l e P o w e r S u p p l y C u s t o m P r o g r a m
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3. To stop playing the program and return the Power Supply to set-up mode, press
and hold
(STOP). You can do this while the program is either playing or
paused. (The program stops automatically after the number of repetitions speci-
fied by the Auto-repeat parameter.)
If the output current exceeds the Power Supply’s maximum-current setting (see
“Maximum Values” on page 20), the output voltage drops to zero, the display reads
OL (for “overload”), and Current LED flashes amber. Press
to return the Power
Supply to set-up mode.
If the program calls for the Power Supply to exceed its voltage-limit setting, the pro-
gram stops running, the output drops to zero, and the Voltage LED flashes amber.
Press and hold
to return the Power Supply to set-up mode.
Example Custom Programs
The following tables show some examples of programs and settings with the resulting
output.
Time Delay
Long Ramp
Settings
Graph Type Step Time Auto-repeat
1 60 s 1
Voltage values
0, 0, 0, 0, 5, 5
Use a program like this to make the Power Supply wait for a certain interval (after you press ) before turning on a
constant voltage. By varying the number of “0” entries and “5” entries, you can vary the off-time-to-on-time ratio.
Settings
Graph Type Step Time Auto-repeat
0 600 s 1
Voltage values
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
The standard ramp function has a maximum time of about 16 minutes. A custom program like this, however, can produce a
much slower ramp, 6000 seconds in this case. In the extreme case of 99 stored points with Step Time set to 999 seconds,
the ramp would last for over a day.