California Instruments P Series, Руководство по обучению

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PGUI / PGUI32 Training Manual
28 1.1
will get an error when you try to execute the transient list. The AC Source does
not automatically switch range to accommodate a higher voltage as this would
cause the output to be dropped temporarily.
8. Starting a transient program with a voltage step is good practice as it will
ensure you start out at this specific voltage value, regardless of what the steady
state value of the source is at the time the step is executed.
9. Move to step No 2 and select ‘V Sweep’ as the transient type. A sweep
allows you to go from the present voltage value to a final voltage value in a
specified period of time.
10. Tab over to the ‘Time (s)’ field and enter 5.0 for a 5 second sweep. Since
we will sweep from 120 Vrms to 20 Vrms in 5.0 seconds, the Voltage slew rate
will be (120-20)/5 = 20 V/s. There is no need to know this however as the
PGUI will calculate this value for you and program the AC Source transient
system accordingly.
11. Enter 20.0 V for the Voltage value. This will cause the voltage to sweep
down from the 120 V entered in step 1 to 20 volt.
12. Move to the next step (No 3) and select ‘V Srg/Sag’ as the transient type. A
Surge/Sag allows you to go to the specified Voltage value for a period of time
and then return to the previous voltage value.
14. Tab to the ‘Time (s)’ field and enter 20 ms. If our frequency is set to 50 Hz,
this will cause the output to surge to 120 V for one full period of the AC output
and then return back to 20 Vrms.
16. Enter 120.0 for the Voltage value.
17. This is the last event in our sequence so we leave the next step Empty.
18. Your Transient window should look like the window shown here at this
time.
19. If you have unit connected, you can run the transient program by Clicking
on the Start button at the bottom of the Transient Window. If you are in
simulation mode, the program will appear to run the transient and stop after
the 5.04 second duration expires. The Start button is disabled while a transient
program is running.
Next we will perform a similar exercise but this time for the frequency.