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Front Panel Operation - 5
65
3 - Programming Transient Operation
Transient operation can be used in the CC, CR or CV mode. It causes the selected channel to switch between
two load levels.
Set transient operation for Continuous mode
In the following example, assume that the CC mode is active, the slew rate is at the default setting (maximum
rate), and the applicable transient operation parameters have been set as follows: continuous mode, main current
level = 5A, transient current level = 10 A, transient frequency = 1kHz, transient duty cycle = 40.
The load module starts conduction at the main level (in this case 5 amps). When transient operation is turned on
the module input current will slew to and remain at 10 A for 40% of the period (400 µs), then slew to and
remain at 5 A for the remaining 60% (600 µs) of that cycle. This cycle is repeated on a continuous basis. Figure
5-5 shows the waveform that would result in this example.
Figure 5-5. Continuous Transient Operation
Action Display
1. On the Function keypad, press Current. On the Entry keypad, press 5 Enter .CURR 5
2.
On the Function keypad, press Current. On the Function keypad, press Q key until
transient current is displayed.
C:TLEV
3. On the Entry keypad press 10 Enter. C:TLEV 10
4. On the Function keypad, press Tran. On the Function keypad, press Q key until
transient duty cycle is displayed.
T:DCYC
5. On the Entry keypad press 40 Enter. T:DCYC 40
6. On the Function keypad, press Tran. On the Function keypad, press Q key until
transient frequency is displayed.
T:FREQ
7.
On the Entry keypad press 1000 Enter.
1000
8. On the Function keypad, press Tran. On the Function keypad, press Q key until
transient mode is displayed.
T:MODE
9. To select the continuous mode, press the Q
QQ
QInput or R
RR
R Input key until the
Continuous mode is displayed. Then press Enter.
T:MODE CONT
10. On the Function keypad, press the Tran key and select ON to activate the transient
mode.
TRAN ON